Late comment, but what ever I’ll put two cents about this: Did Clara betray Aiden? In simpler terms: Yes, in terms of keeping the truth from Aiden about her involvement with Lena’s death. But In complex terms: Not really, Clara didn’t know about Aiden nor Damien when she was hired by Lucky Quinn to track them down after the Merlaut job. So when Lena died in the car crash. She felt guilty and responsible for her actions. So she went out of her way to help out Aiden with his quest to hunt down the people responsible for Lena’s death despite being hesitant at times, while keeping her involvement a secret in fear of being abandoned by Aiden, until Default breached in.
Bro this is actually one of the most common things on Ubisoft games. The backrooms is a feature that started slightly on the first Watch_Dogs game and slowly being implemented on their titles ever since