>>150043868
Season 2 episode "Zuko alone" showed that Azula warned Zuko about the threat to his life. While she taunted him about it, she did warn him regardless. Season 2 ending also had her offer Zuko a way home as a free man. The spinoff comics had her playing the matchmaker for Zuko and Mai.
I think S2 had some early hints that Azula cares about some people, but she does it in her own fucked-up way. She treats other people like toys or something. Even if she genuinely likes Zuko, Mai and Ty Lee, she still enjoys opportunities to manipulate or emotionally torment them.