Ren

Aoba's All-Mate, an all purpose computer that can take various forms. Aoba considers him a dear companion and personally maintains him. They've been together for as long as Aoba can remember. His breed is a Japanese Spitz.

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For some unknown reason, he takes human form within Rhyme.

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Ren is the main partner of the secret, unlockable route which is also the true route of the story.