Callisto will be keeping her memories, buuuuuut she'll be super enthused by all of the other violent-leaning Kestrels tbh. The AU Callisto that people will remember will have been a bit more measured, but still would have high-key approved of people using any means necessary to keep their friends safe, if you're up for saying they bonded over that? Either to friendship levels or just grudging respect levels; either works!