I'm also super into studying PBs and finding the perfect one to suit different characters, so you're in good company. ♥ I actually hadn't used Luke before this!! A tragedy. His expressions are lovely.
I poked through Vala's app and ... holy hell, she's been through a lot. I'm definitely seeing the similarities with both of mine, so it'll be super interesting to see how they mesh. Fenris, generally, tends to be more tolerant of lying because he gets that it's a defense thing, but Noctis ... we'll have to see. A lot of people he loves lied to him in his life, and it can be a touchy subject.
That said, I love writing complicated stuff like this, and you're 100% welcome to have Vala flirt with either of them! I'm always amused by that. And you clearly play awesome characters, too. ♥