Do you think all of the Witches 5 posed as students in the anime, like they did in the manga? Viluy was definitely a student, as well as Tellu (since the Senshi found her Mugen I.D. after she died), but do you think the other three had alias as students of the school?

I would imagine Eudial as more of a Professor than anything else.

I can see them as high school students because you know, the whole Mugen Gakuen thing. So they could definitely be on par with the senshi age wise. Though, they do look a little older than the senshi, but not by much. This includes Eudial. She could've been an older student.

I think that they were, like in the manga, students in Mugen Academy. For Viluy and Tellu, it was official, but I'm sure it applies to Mimete, Eudial, and Cyprine as well.
They are probably older students though. Maybe from the college section...?
No wait, the ribbon on Viluy's uniform was for the high school... She would have to have been a thrid year then.

Maybe Eudial, Mimete and Cyprine already graduated? Nothing says the Witches are all the same age.

Mugen Academy went through graduate school, so perhaps they're all teaching assistants for the ones who look too old to be middle or high school students.