[@Riffus Maximus] Yeah, you can puppet him in the collab while i'm gone, Riffus. 

For the first day, with all of the shopping, he would likely go for some comfortable clothes when they get there, something gamer or metal looking if he has a choice in style. 

He would likely try to hang around Angel after the clothes store, especially if she went to a music store, and would likely try to initiate conversation to try to get to know her better. If others joined in, then of course he would try to get to know the others as well. If he could hang around with her long enough would ask what Angel's doing the next day, wanting to hang out with her again after a good day of shopping.

The next day, if she allows him, Aaron would likely hang with Angel, exploring the campus a bit and trying to spur up more conversation with a respect for however the girl is feeling that day. When at the training/release area he would probably summon his clockwork helicopter with one machine gun on it for training if Angel, himself, and anyone else who possibly joins along with the group that day is going to train for a bit. If not training, he's probably go along with the group and see what they want to do. 

If he was left on his own and not allowed in the group at any point, he'd just sit and play games in his room. 

The final day, he'd probably hang around her a bit if she's willing, perhaps try to share music with her if he brings his music device again, before possibly giving her some space if she doesn't want to talk for a third day in a row. He would most definitely show up at the dinner reunion she is planning as well.