The Sehan supposedly are AI put in place for the task of basic surveillance and giving out information on occasion. Their names are gray and blend in with the server's gray background. Their profile images are black and white and seem to make references to each one of the DCOMrades.
They intervene in conversations when there's mentions of inappropiate or copyright-infringing content. They were also the ones who designated the Subjects each of their names.
The word "sehan" comes from Proto-Germanic and means "to notice" or "to seek".
They are probably very cute