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Character:

Kotono is a young, usually cheerful, girl working for the Kuroki Detectice Agency. As a child, she was abandoned near a church with no memories of who she was or where she came from. The church's priest, Joshua, took her in as his own daughter. Her card is Justice and she transforms into Loli Black. Her weapon is a sword which she uses as a final attack on the enemy.

Source from Wikipeida