[quote=PhantomSekai]
Well, Mia herself is technically a feral mage but as she only manipulates steel and her main magic is her steel arm, as long as she doesn't openly go "Hey guys, check this cool metal arm magic trick" or make steel float she could probably go undetected. As for Emil, his magic tends to be more support/defense oriented so again, as long as we aren't openly using our magic, we shouldn't be easy to point out. Or do the guardian/tower mages have a way to detect other magic users?
[/quote]

Illusionists can, since the school of Illusion has to do with any spells affecting the mind (including mind reading, so they would read your mind to know you're a mage), but otherwise no.