Ryo’s sister. She is 16, the same age as her brother. Mature for her years, she is generally calm and collected, although Yuka’s carnivorous tendencies are rubbing off on her of late.
She finds herself involved in Memeframe’s factional struggles, and tries to take back Lacia from Arato Endo.
She is somewhat estranged from her brother. She loves milk tea.
It is shown that Shiori is in love with Arato and later confesses to him by kissing him on the mouth.