Harper Sensha

Harper Sensha is the bassist of Ryuki and the Archangels. She is somewhat the mother of the group and often acts as their emotional support. She is one of the group's founding members with Ryuki and often lends backup vocals as well. She is not a magic user, though she can read demon's tongue and sigils.

Eidolona
Harper eventually gained the ability to communicate with demons and ghosts, taking the name "Eidolana" when helping Ryuki or the dark league.