Ena SeishuuinEdit

Susanoo appears to have a close relationship to Ena, as she wields his sword Ame no Murakumo no Tsurugi, and she calls him Grampsy.

Godou KusanagiEdit

Susanoo seems to have a great deal of respect for Godou. Whether this is simply because he's a Campione, or because of how Godou acts and uses his powers, is unknown.