Aoi

Aoi is fanatically loyal to Maria, to the point of attacking Masane in a blind rage, for injuring Maria, later in the series. This proves to be fatal, as she is impaled and killed by Masane. Her last words were for Maria to continue her quest to obtain the Witchblade. It is also worth noting that Aoi is the only person Maria seems to care about, being her only friend, to the point of crying over her death. Another noteworthy aspect about Aoi's personality is that Shiori was brutally loyal to Reina so its possible that Aoi could have some of Shiori's genes