Character profile
Kotarou Mochizuki
望月コタロウBiography
Kotarou Mochizuki is Jirou's younger brother, though he differs greatly from him in appearance and does not show the same vulnerability to sunlight or water. He also appears unusually resistant to pain.
Story spoilers
Kotarou is eventually revealed to be the reincarnation of Jirou's former lover, Alice.
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