Kaguya Ray Peram Westcott

Kaguya Yamai, later revealed to be Spirit Amalgam, and later known as Kaguya Ray Peram Westcott or The Impostor and False Kaguya was the main antagonist of the 2019 mobile game Danmachi Memoria Freese - Ais Catastrophe, being introduced as the main antagonist of the crossover between Is It Wrong to Pick Up Girls in a Dungeon? and Date A Live. Kaguya was a fragmental Spirit born from the mana of all Spirits sealed by hero Shido Itsuka who merged herself with Isaac Ray Peram Westcott and the mastermind who teleported the heroes of Date A Live universe to Damanchi world. She was later revealed to be a Spirit Amalgam who merged herself with Westcott's personality, becoming a new Isaac Westcott from the Second World. She serves as the evil counterpart of Mayuri.

She was a immensely powerful Spirit who could use the power of all Angels from the Sephira Tree and could easily manipulate the powers of the Spirit of Origin, Mio Takamiya, to turn other being in Spirits as easily as Mio could.

She was voiced by her original VA from the original anime and games, Maaya Uchida, whom also voices Frenda Seivelun.

Personality
"Westcott" was good (almost perfect) in imitating the original Kaguya. She was outgoing and outspoken to the point of being childish or immature. Unlike Yuzuru, she reacted violently to critiscism and refused to let others tell her what to do.

Kaguya often speaks rather unrealistically, as if she is acting. It is later revealed that it really is acting. Kaguya believes she needs to talk like this because she is a Spirit, and therefore "super awesome", and therefore must act appropriately.

After she shows her true clolors, she showed to be a twisted and insane Spirit. She sees everything existing for her sake and inflicts betrayal purely because she loves the expression on her victim's face when their friends and family are turned against them. When Liliruca asked why she deceived her for so long, she immediately starts acting like she's the victim and feels sorry for not killing her before exposing herself to be the mastermind behind all the tragedies of the heroes' party.

Kaguya was a Spirit with complete and utter obsession with war, genocide, despair and destruction, and even stating she sees the multiverse as her plaything to travel and destroy worlds with her heart's content. She loves sorrow in any and all of its aspects; even if she is the one suffering or having her own life at risk provokes nothing but glee and excitement.