Quote Originally Posted by nonsensei View Post
They're in fact guardians by name. They refer to themselves as "守護者" which translates to exactly that. It's not a made up term.
I don't like it since the term "Guardian" is already in use for the level 1-5 things in Unions. I don't know what's the term for that in Jap version, though.

Anyway, DMM wiki calls them オリンピア as well for whatever reason, so I'll go with Olympia raids until Nutaku decides otherwise.