All right.
All magical girls - that's the term, she didn't pick it - can shapeshift and make clothes and accessories for themselves. The shapeshifting is limited in two ways - she can only look so close to human (like this, for example, tiny claws and pointed ears and something odd about the example girl's posture), and if she goes too far from human, she'll stop being herself, mentally, and instead be a cryptid. Cryptids are weird and nobody knows very much about them but she's not going to become one, so it doesn't matter very much unless there start being other magical girls here somehow. Clothes she can do whatever she likes with, and the prettier she is the better her magic gets.
For magic, she has the two spells he's seen. The first one is the one she's using to talk to him right now, and it's not very complicated. The second one makes cartoon things; it can make anything she imagines, but the things always look fake, and they don't always work - books don't work, complicated electronics don't work, decks of cards look like they work but the cards don't have the right values, that kind of thing. Anything without moving parts or information on it works fine, writing things down works fine, bikes work fine, hot air balloons work fine, she could probably make a plane if she wanted to. Things with moving parts will stop working if she's not paying attention to them. Some girls get more spells than that, if they're pretty enough, but her second spell is really good; it'd probably take a lot for her to get a third one.