Sayanomiya KaoruEdit

As co-workers in the History Compilation Committee, they seem to share a friendly, professional relationship.

Yuri MariyaEdit

Amakasu relationship with Yuri Mariya is usually business associate with History Compilation Committee where they request assistances from each other occasionally.

Erica BlandelliEdit

Amakasu sometime on rare occasion give information to Erica’s request with some secret withheld of course, however he does not like to directly negotiate with Erica if he cannot help it.