Well, Alex is a rather friendly person who's very interested into the inner works of magecraft. She more or less can be friends with anyone who doesn't think that a mage with no crest and that sticks just to the basics, refining them to an art, is some kind of lunatic.

She would be especially interested on Charlie if she learned about her magecraft style and, doubly especially, if she learned about the Fairy Eyes, since Alex has a big interest in Fairy Eyes.