The Shouting Tiara is a Shadow in the Persona series.
Shouting Tiara appears in the second half of the second section of the Yabbashah Block within Tartarus, from floors 102 to 113. It will be the subject of one of Elizabeth's subjugation requests, during which time it will drop Tiara's Hair. Returning to Elizabeth with 5 Tiara's Hair will complete the quest.
The Shouting Tiara later reappears as a supporting shadow for the boss on 20th floor of Antenora within the Abyss of Time, the Primitive Idol, along with the Wrathful Book. During the battle, the Shouting Tiara will cast Masukukaja to increase the hit and evasion rate of its allies, along with using Ice Break to strip the defenses of any party member that Nulls, Repels, or Drains Ice attacks. Should the Wrathful Book be successful in afflicting party members with the Rage status, the Shouting Tiara will respond by casting Tetrakarn so that the afflicted member may potentially KO themselves by attacking the barriers physically. Should the shadows begin to run low on HP, the Shouting Tiara will use Media to attempt to heal them.
It is highly recommended to keep the target downed to prevent it from assisting its allies. The boss lacks any sort of Dodge or Evade skill on its weakness, using Ice skills to knock is down (and keep it knocked down) is consistent and should be attempted at all possible times. Additionally, it can be inflicted with any status effect, resisting most but being neutral to Rage and Panic, which can be used to eliminate it as quickly (and safely) as possible.