Ok so basically, in the multiverse, there was a timeline that failed to exist due to it's obscurity. The only one who really existed in that timeline was Aya, who had stayed there ever since she was created. Aya has never had that much development before meeting Ink, which also means she can't express how she feels correctly. She's somewhat shy and confused upon first meeting, as she hasn't really interacted with anyone ever since her timeline basically doesn't even exist. She can be really naive and stupid depending upon the situation because she doesn't know how to handle certain things. Her lack of an AU also interferes with what her abilities should have been. She of course was supposed to have your average sans powers, but she's never had to use them because she's never had to fight. Although, after getting out and being exposed to everything happening outside her timeline, she was forced to try to learn how to use her abilities. Although, even if she uses her powers, they're faulty and unstable