My guess is that Alyssa is mostly traditional but she's interacted with some Silph/Devon people before so I think she'd probably actually have one pair of jeans (if she could find one), they're super useful and durable. Otherwise I imagine she probably has some sets of travelling clothes, artist stuff (probably a very painted smock) and then some of the nicer dressier stuff like the cardigan she had and, like, a scarf probably? She's from Vibrost so she probably has some good cold-weather gear.