Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, may be the reincarnation of Sarina Have a tendencyōji, one among Gorou's people who was a supporter of Ai. 4 several years afterwards, Ai is murdered before the twins by precisely the same supporter who killed Gorou. The supporter later on commits suicide, but Aqua deduces that the mu