Talk:Aogiri Tree/@comment-5839827-20150726203918/@comment-26689808-20150727135714

^That's because the anime never went into detail about it.

In the manga, Shinohara and Kuroiwa are shown talking together about the One Eyed Owl, and the possibility of there being 2 different Owls, which was correct. Eto is the real "One Eyed Owl" while Yoshimura covered for her, pretending to be the One Eyed Owl (since their armour kakujas look almost the exact same).

The anime has very little backstory of the One Eyed Owl compared to the manga, so I'd suggest reading it if you want to find out more about it.