I have Gia Jones. Not sure if she works for your plot because she's sort of prickly and doesn't really like anyone... but she could use a friend. She has some PTSD tendencies after a bad experience with a vampire. She's got a good heart though, but she's a little rough around the edges.

She will appreciate Archer's kindness, and they have similar goals (to protect the good from the bad). Also it would be natural for her to question someone else's motives, especially if they're supernatural. So she would have no problem calling Blaise out.

Let me know if I could help! But no biggie if someone else works better for what you guys have in mind. I don't need to steal all your plots <3