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The Fusion Forecast (合体予測, Gattai yosoku)? is a system unique to Persona 4 where potent bonuses can be granted to Personas fused on certain days. You can get this forecast for the current day and the day after it by visiting the Velvet Room.

Fusion Forecast Triggers

Sometimes, conditions - also known as triggers - other than simply fusing on a given day must also be met in order to take advantage of these bonuses. They are fairly simple, though:

  • Ingredient Triggers - Use one or two given Personas or Personas from one or two given Arcana in order to receive the bonus.
  • Result Triggers - You will receive the bonus if you create a given Persona or a Persona of a given Arcana.

Fusion Forecast Rewards

Meeting those conditions (if they exist for the day) can offer a range of rewards:

  • Bonus Stats - The Persona receives two permanent bonus stat points, which are always one for the strongest stat and one for the weakest stat (after any leveling from Social Link bonus experience.)
  • Bonus Social Link EXP - Any experience that the Persona receives from its corresponding Social Link is multiplied by a certain amount.
  • Bonus Skill - The Persona obtains a given skill. Yoshitsune, for example, can get Arms Master or Debilitate if he is fused on certain days.
  • Bonus Typed Skill - The Persona obtains a skill of a type that is specified beforehand (there are Fire, Ice, Electric, Wind, Recovery and Support Skill Days.) The higher the Persona's level after any leveling from Social Link bonus experience, the better the skill received. In this manner, it is possible for Personas to get skill upgrades or learn magic of a type that they are normally incompatible with. For example...
    • If Gabriel is fused on an Ice Skill Day, an upgrade from Mabufula to Bufudyne, which can become Mabufudyne with an Upright Magician, will be offered.
    • If Succubus is fused on a Recovery Skill Day, she can learn Mediarama, which she cannot learn or inherit.
  • Skill Change - One of the Persona's skills is randomly chosen and the choice is given of whether to change it or not. If the option to change it is taken, the skill changes into a skill of a similar caliber (as determined by the game). This opens up still more possibilities - for example, if Isis is fused on a Skill Change Day, Absorb Ice can potentially change into Primal Force, which is all the more amazing since she cannot learn or inherit physical attack skills. A well known example is allowing Kaiwan to change Tetrakarn into many high powered skills, including Victory Cry.

Specific Fusion Days

Persona 4 Golden

Date Trigger Effect
April 18th None Persona earns random Stat Increases
April 19th Use Magician Arcana in a Fusion Persona learns Zio
April 21st Fuse Archangel Persona earns random Stat Increases
April 23rd Fuse Ghoul or Orobas Persona learns Rakunda
April 24th None Persona gets random Skill Change
April 25th Fuse Cu Sith or Orobas Persona learns Media and earns random Stat Increases
April 27th None Persona earns random Stat Increases
April 28th Fuse Berith Persona learns Mabufu
April 29th None Persona earns random Stat Increases
April 30th None Persona earns random Stat Increases

Date Trigger Effect
May 1st Fuse Jack Frost Persona learns Resist Fire and earns random Stat Increases
May 2nd None Persona earns random Stat Increases
May 3rd None Persona gets random Skill Change
May 4th None Persona gets random Skill Change
May 7th None Persona earns random Stat Increases
May 12th Fuse Ara Mitama Persona learns Auto-Tarukaja
May 18th None Persona gets random Skill Change
May 21st Fuse Persona of the Justice Arcana Persona learns Maragi and earns Bonus Exp
May 24th Use Andras in a Fusion Persona learns Resist Wind
May 25th Fuse Persona of the Aeon Arcana Persona learns Agilao
May 28th Fuse King Frost Persona learns Growth 1
May 31st Use Shiisaa in a Fusion Persona earns random Stat Increases and Bonus Exp

Date Trigger Effect
June 2nd Fuse Persona of the Magician Arcana Persona learns random Evade skill and earns random Stat Increases
June 3rd Fuse Ares Persona learns Null Poison
June 4th None Persona earns random Stat Increases
June 7th Use Hanged Man Arcana in a Fusion Persona learns Resist Ice and earns random Stat Increases
June 9th Use Moon and Devil Arcana in a Fusion Persona learns Wind Boost
June 10th None Persona earns random Stat Increases
June 12th Fuse Incubus Persona learns Null Ice
June 13th Use Rakshasa and Matador in a Fusion Persona learns Resist Ice and earns random Stat Increases
June 14th None Persona earns random Stat Increases
June 21st None Persona learns random Evade skill and earns random Stat Increases and Bonus Exp
June 24th None Persona gets random Skill Change
June 27th Fuse Persona of the Jester Arcana Persona gets random Skill Change
June 28th Use Yomotsu-ikusa in a Fusion Persona learns Resist Wind
June 30th Use Titania and Makami in a Fusion Persona learns Bufula and earns random Stat Increases

Date Trigger Effect
July 1st None Persona earns random Stat Increases
July 4th None Persona gets random Skill Change
July 5th Fuse Persona of the Emperor Arcana Persona learns random Support skill
July 8th None Persona earns random Stat Increases
July 9th None Persona earns random Stat Increases
July 14th None Persona gets random Skill Change
July 15th None Persona gets random Skill Change
July 16th None Persona earns random Stat Increases
July 18th Fuse Flauros Persona learns Power Charge
July 24th Use Pyro Jack in a Fusion Persona learns random Ice Resist skill
July 26th None Persona earns random Stat Increases
July 30th None Persona gets random Skill Change

Date Trigger Effect
August 1th None Persona earns Bonus Exp
August 2th Use Samael in a Fusion Persona gets random Skill Change and Stat Increases
August 4th None Persona gets random Skill Change
August 5th None Persona gets random Skill Change
August 6th Use Orthrus and Yatagarasu in a Fusion Persona learns Null Exhaust and earns Bonus Exp
August 7th None Persona earns Bonus Exp
August 10th None Persona learns random Support skill
August 11th None Persona earns random Stat Increases
August 12th None Persona earns random Stat Increases
August 13th Fuse Persona of the Death Arcana Persona learns Mediarama and earns Bonus Exp
August 14th None Persona earns random Stat Increases
August 22nd None Persona gets random Skill Change
August 23rd None Persona gets random Skill Change
August 24th None Persona earns Bonus Exp
August 25th None Persona earns random Stat Increases
August 27th Fuse Rangda Persona learns Null Ice
August 29th None Persona earns random Stat Increases

Date Trigger Effect
September 1st None Persona gets random Skill Change
September 2nd None Persona earns Bonus Exp
September 3rd Use Moon Arcana in a Fusion Persona learns random Support skill and earns random Stat Increases
September 4th None Persona gets random Skill Change
September 5th None Persona gets random Skill Change
September 6th None Persona earns random Stat Increases
September 7th Fuse Cu Chulainn Persona learns Null Elec and earns random Stat Increases
September 16th None Persona gets random Skill Change
September 17th Use Leanan Sidhe in a Fusion Persona learns random Ice skill and earns Bonus Exp
September 18th None Persona gets random Skill Change
September 21st Fuse Tam Lin Persona learns Amrita and earns random Stat Increases and Bonus Exp
September 22nd None Persona earns Bonus Exp
September 25th Use Throne in a Fusion Persona learns random Ice skill and gets random Skill Change and Bonus Exp
September 27th None Persona gets random Skill Change
September 28th None Persona earns random Stat Increases

Date Trigger Effect
October 1st Use Fool Arcana in a Fusion Persona learns random Recovery skill and earns Bonus Exp
October 3rd None Persona gets random Skill Change
October 4th None Persona earns random Stat Increases
October 5th None Persona earns random Stat Increases
October 8th Fuse Raphael Persona learns Mind Charge
October 11th None Persona gets random Skill Change
October 12th None Persona earns random Stat Increases
October 16th Use Justice and Priestess Arcana in a Fusion Persona learns Repel Fire
October 21st Use Empress Arcana in a Fusion Persona earns random Stat Increases and Bonus Exp
October 22nd None Persona earns random Stat Increases
October 23rd None Persona earns Bonus Exp
October 25th Fuse Garuda Persona learns Spell Master and earns random Stat Increases and Bonus Exp
October 26th None Persona gets random Skill Change

Date Trigger Effect
November 2nd Use Cerberus in a Fusion Persona learns Samarecarm and earns random Stat Increases
November 3rd None Persona gets random Skill Change and Bonus Exp
November 7th None Persona gets random Skill Change
November 8th Fuse Daisoujou Persona learns Mind Charge
November 9th None Persona gets random Skill Change
November 11th None Persona earns random Stat Increases
November 12th Use Magician Arcana in a Fusion Persona learns random Elec skill and earns Bonus Exp
November 13th None Persona earns random Stat Increases
November 15th Fuse Siegfried Persona learns Enduring Soul and earns random Stat Increases
November 18th None Persona earns random Stat Increases
November 19th Fuse Nebiros Persona learns Aliment Dance and earns Bonus Exp
November 20th None Persona earns random Stat Increases
November 24th Fuse Kartikeya Persona learns Angelic Grace
November 26th Use Magician Arcana in a Fusion Persona learns Marakukaja

Date Trigger Effect
December 8th Fuse Hell Biker Persona learns Evade Ice and earns random Stat Increases
December 11th Use Judgement Arcana in a Fusion Persona learns random Fire and Elec skills and earns Bonus Exp
December 12th None Persona earns Bonus Exp
December 13th None Persona gets random Skill Change
December 15th Fuse Alice Persona learns Angelic Grace
December 16th None Persona earns random Stat Increases
December 17th None Persona earns Bonus Exp
December 19th Fuse Yoshitsune Persona learns Arms Master
December 21st Fuse Ishtar Persona learns Insta-Heal and random Fire skill
December 23rd None Persona earns random Stat Increases
December 24th Fuse Yoshitsune Persona learns Debilitate

Date Trigger Effect
January 11th Use Aeon Arcana in a Fusion Persona learns Enduring Soul
January 13th None Persona gets random Skill Change
January 11th Use Fool and Judgement Arcana in a Fusion Persona learns Salvation
January 16th None Persona earns random Stat Increases
January 18th Fuse Suparna Persona learns Evade Ice and earns Stat Increases
January 21st None Persona earns Bonus Exp
January 24th None Persona gets random Skill Change
January 27th Use Fortune Arcana in a Fusion Persona learns random Ice skill and earns Stat Increases
January 28th None Persona earns Bonus Exp
January 31th Use Death Arcana in a Fusion Persona learns random Recovery skill

Date Trigger Effect
February 1st None Persona earns random Stat Increases
February 3rd Fuse Persona of the Moon Arcana Persona learns Unshaken Will
February 5th None Persona gets random Skill Change
February 13th None Persona earns random Stat Increases
March 20th None Persona gets random Skill Change


Characters
Playable Protagonist - Yosuke Hanamura - Chie Satonaka - Yukiko Amagi - Kanji Tatsumi - Rise Kujikawa - Teddie - Naoto Shirogane
Social Link Margaret - Nanako Dojima - Ryotaro Dojima - Naoki Konishi - Kou Ichijo - Daisuke Nagase - Hisano Kuroda - Sayoko Uehara - Yumi Ozawa - Ayane Matsunaga - Ai Ebihara - Fox - Shu Nakajima - Eri Minami - Marie - Tohru Adachi
Major Igor - Mayumi Yamano - Misuzu Hiiragi - Saki Konishi - Mitsuo Kubo - Hanako Ohtani - Kinshiro Morooka - Noriko Kashiwagi - Taro Namatame - Old Lady Shiroku - Master Daidara - Minoru Inoue - Yuuta Minami - Kaneko - Aika Nakamura - President Tanaka - Chihiro Fushimi - Mr. Edogawa - Kanami Mashita - Moel Gas Station Attendant
Major enemies Shadow Yosuke - Shadow Chie - Shadow Yukiko - Shadow Kanji - Shadow Rise - Shadow Teddie - Shadow Mitsuo - Shadow Naoto - Kunino-sagiri - Ameno-sagiri - Kusumi-no-Okami - Izanami
Locations
Inaba Central Shopping District - Dojima Residence - Junes Department Store - Samegawa Flood Plain - Velvet Room - Yasogami High School
Midnight Channel Twisted Shopping District - Yukiko's Castle - Steamy Bathhouse - Marukyu Striptease - Void Quest - Secret Laboratory - Heaven - Magatsu Inaba - Hollow Forest - Yomotsu Hirasaka
Other Okina City - Shichiri Beach - Midnight Trivia Miracle Quiz - Tatsumi Port Island (Gekkoukan High School - Club Escapade - Iwatodai Station)
Music
Albums Original Soundtrack (Persona 4 / Golden) - Never More -Reincarnation- - Persona 20th Anniversary All Time Best Album
Songs "Studio Backlot/Backside of the TV" - "Heartbeat, Heartbreak" - "Heaven" - "Never More" - "Pursuing My True Self" - "Aria of the Soul" - "Reach Out To The Truth" - "I'll Face Myself" - "Signs of Love" - "Someone Else's Man" - "Your Affection" - "P3 FES" - "Sky's The Limit" - "Beauty of Destiny" - "True Story" - "Key Plus Words" - "The Way of Memories" - "True Feelings" - "Shadow World" - "Time To Make History" - "SNOWFLAKES" - "We Are One and All" - "Time For True Revelation" - "Falling into Right Places" - "Alone in this World" - "Koisuru Meitantei" - "Dazzling Smile" - "Ying Yang" - "Ain't Nobody Can Hold Me Down" - "Just Like The Wind"
Archives
Terminology Persona (Initial / Ultimate) - Persona user - Glasses - Fog - Shadow - Shadow Self - Party - Tactics - All-Out Attack - Shuffle Time - Arcana Chance - Fusion Forecast - Weather Forecast - Investigation Team - Mystery Food X - Phoenix Ranger Featherman R
Lists Arcana - Personas - Shadows - Skills - Items (Vending Machines) - Requests - Status Changes - Activities - Calendar - Golden Trophies - The Animation / Golden Animation Episodes - Patches and Updates
School Life Weather Forecast - Seasons - Social Link - Social Stats - Yen - Class - Studying - Books - Movie theater - Bed - Fishing - Cooking - Part Time Jobs - Shrine - Scooter - Gardening - School Club - Bug Catching - Refrigerator - Crane Machine - Chagall Café - Tanaka's Amazing Commodities
Other Media
Games Golden - Arena - Arena Ultimax - Dancing All Night
Productions The Animation / -The Factor of Hope- / The Golden Animation - Visualive / the Evolution - Persona Stalker Club - 「PERSORA AWARDS」 - PERSORA AWARDS 2 - PERSORA AWARDS 3 - Persora -The Golden Best- - Persona VS
Publications Manga - The Magician - Dengeki Comic Anthology (the Animation / The Golden / The Golden Animation) - Kiri no Amnesia - Your Affection - Persona x Detective Naoto (manga) - Persona Magazine
Drama CDs Persona 4 (Vol.1 / Vol.2 / Vol.3) - Persona 4 The Animation (Vol.1 / Vol.2) - Persona 4 Golden (Vol.1 / Vol.2)
Mobile Games The Card Battle - Colors - Persona 4: The Slot - Persona 4 the Pachinko
Events Music Live 2008 - Music Live 2009 - Music Tour 2010 - Music Live 2012 - Music Fes 2013 - Music Box 2014 - Super Live 2015 - Livehouse Tour 2015 - Super Live 2017 - Super Live 2019- 25th Anniversary Symphonic Concert
20th Anniversary Festival - 25th Anniversary
Miscellaneous Merchandise
Franchise-wide
Demon - Magic (Fusion Spell) - Battle Stats - Damage - Accuracy - Experience - Level - Guard - Element - Multi-hit - Signature Skills - Extra Skills - Critical - Status effects - Macca - Yen - Battle Drops - Magnetite - Incense - Alignment - Moon Phase System - Demon Summoning Program (COMP) - Cathedral of Shadows (Fusion - Skill Inheritance - Accidents / Special / Three-demon / Sacrificial / Sword) - Demonic Compendium - Evolution - Special conversation - Rag's Jewelry - Code Breaker - Turn Press - New Game Plus - Ultimate boss - Streetpass - Password - Difficulty - Skill Mutation - Energy Drain
Shin Megami Tensei series
Terminal - Guardian (if...) - Capacity (NINE) - RTS (NINE) - Reinforcements (NINE) - Race Shift (NINE) - Modules (NINE) - Magatama (3) - Reason (3) - Demon Co-Op (SJ) - EX Missions (SJ) - Challenge Quest (4) - Whisper event (4) - Smirk (4) - Barrier (4) - Partners (4A) - Magatsuhi Skills (5) - Miracles (5) - Essence (5)
Devil Summoner series
Loyalty - Personality - Mystic Change - Nemechi (SH) - Case Files (RKKA)
Majin Tensei series
Rank - Affinity (2) - Arcana (Ronde)
Persona series
Shadows / Personas (Initial / Prime / Ultimate / Ancestor / Reverse / Sub) - Skill Card - Totem (1) - Type/Subtype (1+2) - Affinity (1+2) - Rank (1+2) - Mystic Change (1+2+5) - One More (3-5) - Growth Rate (1+2) - Unknown Power (1+EP) - Personality (1+2, 5) - Material Card (2) - Mutation (2) - Follow Up - All-Out Attack (Cut-in) - Heart Item (3) - Shuffle Time (3+4) - Daily Life (3-5) - Calendar (3-5) - Social Stats (3-5) - Social Link (3+4) - Tactics (3-5) - Requests (3-5;Q+Q2) - Arcana Chance (4) - Forecasts (Fusion / Weather) (4+5) - Boost (Q+Q2) - Power Spot (Q+Q2) - F.O.E (Q+Q2) - Confidant (5) - Technical (5+5S) Treasure Demon (5+5S) - Party Switch (5+5S) - Disaster Shadow (5R) - Fusion alarm (5R) - Persona Traits (5R) - Third Eye (5+5S) - Master Arts (5S) - BOND (5S) - Persona Points (5S)
Devil Children series
Trainer - Bank - BattleNet - Relic Fusion - Power Fusion - Powers
Digital Devil Saga series
Berserk Mode (2)
Devil Survivor series
Devil Auction - Extra Turn Battle - Skill Crack - Titles (DSO / DS2 / RB) - Fate System (2) - Add-On (2)
Other
Equip Type (GMT:TM) - Skill Systems (GMT:TM) - Sword Exchange (GMT:TM) - Class Change (TMS♯FE) - Topic System (TMS♯FE) - Side Quests (TMS♯FE) - Ad-lib Performance (TMS♯FE) - Session (TMS♯FE) - Dual Arts (TMS♯FE)
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