Some of these thirsty people defending Aquila thinking it's okay to kill young children. Aquila would have killed a little girl, a young child, for telling what she thinks is a scary legend she probably heard from adults. She doesn't know anything about politics or who the witch is, she's a CHILD. What is wrong with you people that you think murdering children is okay because speaking out against the royal family is considered punishable by death? Who cares if he doesn't know what he's doing because it might not be the point in time he turned back time, or that it's "wayyy" in the past. It is still Aquila, you can't undo your actions.
What Uriel has seen and the way Lamia acts towards him is perfectly justified as to why they're wary of him. Even if Aquila "changed" because of going back in time, the siblings are not privy to that. A person who changes from cruel to kind when you meet them is suspicious. Even then we saw that Aquila had tendencies of coldness towards Uriel, so not all has changed.
