I think all in their 20s+, but the sword magician hybrid I'm not sure, and there is already a grandma loli.

Interesting enough the series uses that to enable most of the students to not have trained with each other/know each other in that way. At least they weren't all in the same blessed class or the like, and as far as I can tell, only Knight girl seems infatuated by Baryl. The rest just look up to him in a 'head pats, please' kind of way.