He transfers to Seidoukan Academy to investigate his sister's disappearance and to figure out what he is supposed to do (

Spoiler

he later says that it is to protect Julis

).
Ayato sports a friendly, polite, and helpful personality with a penchant for ending up in awkward situations. He is indiscriminate as to who he is being friendly to and is helpful to a fault, as well as being a bit naive. However, underneath the soft facade lies a person with an indomitable will who always tries to do the right thing, regardless of the potential trouble that he will get himself into.