Adramelech was a form of sun god, the center of his worship was the town of Sepharvaim and was brought by the Sepharvite colonists into Samaria. Like other pagan gods, Adramelech is considered a demon in Judeo-Christian tradition. According to Collin de Plancy's book on demonology, Adramelech became the President of the Senate of the demons. He is also the Chancellor of Hell and supervisor of Satan's wardrobe. Being generally depicted with a human torso and head, and the rest of the body of a mule or peacock.
A poet's description of Adramelech can be found in Robert Silverberg's short story "Basileus." Adramelech is described as "The enemy of God, greater in ambition, guile and mischief than Satan. A fiend more curst — a deeper hypocrite." In classic literature, Adramelech is a fallen angel, vanquished by Uriel and Raphael, in Milton's Paradise Lost.
"Chancellor of Hell and supervisor of Lucifer's wardrobe. Has the body of a mule and the plumage of a peacock. Worshipped by the Ayssrians sic, who sometimes offered children to him as a sacrifice."
—Shin Megami Tensei IV Apocalypse compendium
Adramelech is the first boss of the game, appearing before Nanashi, Nikkari, Manabu and Asahi. Having been ordered to purge Tokyo clean of the weak by Lucifer, he attacks with a horde of Fallen demons. During the fight he kills Manabu with his fire magic and finishes Nikkari afterwards. He kills Nanashi only for him to revive and fight back. His horde is killed in the second fight, but he retreats before he could be killed.
He appears alongside a Power on Lucifer's orders to help Nanashi oppose Shesha in the first fight against the serpent. Adramelech is later fought in front of Tsukiji Konganji, where he dies in their final encounter. During the battle, Nanashi can make various choices affecting the flow of the battle.
> Adramelech charges his power, then starts attacking Asahi. > What wil you do?
Hit him while he's off guard.
Asahi KO'd if current partner Nanashi attacks Adramelech for heavy damage Adramelech +Tarukaja/Makakaja
Nanashi takes heavy damage (regardless of Fire resistance)
"Hahahaaa... Burn. Burn! All of you, burn!"
(If Asashi was protected earlier)
Party takes no damage Asahi heals entire party (Mediarahan) Adramelech +Rakunda
Shield your partner
Nanashi takes heavy damage despite Fire resistance Assist Gauge increases Adramelech +Tarukaja/Makakaja
Use your partner as a shield
Current partner KO'd Adramelech +Rakunda Nanashi +Smirk/Tarukaja/Makakaja
Light damage to whole party despite Fire resistance Nanashi inflicted with Bind and Tarunda Adramelech +Rakukaja
During the battle, Adramelech will typically be using Madness Nails and Hellish Brand to inflict damage. Demons with a resistance that Nullifies, Drains or Repels Fire damage will not be affected by Hellish Brand's damage or buff removal. Nanashi can also enjoy this benefit by wearing the Pyro Coat body armor that can be obtained in Shibuya. When Adramelech starts getting low on HP, he will begin using Eat Whole to recover some HP from the attacks. An Attack Mirror or Tetrakarn can cause him to waste his turns. While Adramelech can be debuffed, he will use Dekunda at some points to return his status to normal.
After defeating him for good, Adramelech is unlocked for fusion in the Cathedral of Shadows. A special fusion of Tonatiuh, Kelpie and Murmur will summon him. Adramelech can teach Nanashi the Madness Nails and Eat Whole skills through his Demon Whisper, but his Hellish Brand skill cannot be passed on in any way. He benefits from learning Fire and Physical skills.