My opinion about the girls so far:
For Luna, the discussion remains rather ambiguous, she could just as easily refer to mc as someone else but given that mc has been in the media, the group she is with could also very well want to trap him by using Luna . Ben could do a bargain, so almost anyone having a link with this group on the outside could do the same to improve their situation.
For Kate,
I have the impression that she's perhaps the least dangerous and the more honest of the bunch in the sense that the group she's with probably just sent her to keep an eye on mc to identify those potential enemies he could have and that jack seems to be suspicious of, but she still remain suspicious like all the others.
For Eva
i have mixed signal about her, she saves our lives even if it doesn't seem in his nature to help others like with Kate friend (even if i suspect that she had her hand forced by Christopher in that case), encourages us to be suspicious of everyone and even herself, but at the same time hides useful information from us, so I would tend to think that she could be affiliated with the people who sent mc there.
And for Mia,
she seems to be close to Mc with the way she talks to him
When we have a chance to investigate at the bar and talk to the junkie, the bartender tells us that the customer is a woman, but the junkie tells us that it was a rich millionaire and that it also has something to do with this man's son who was in the news.
When we see what Mia looks like, with her elaborate hairstyle and gold ornaments, I'm inclined to think that she's the daughter of this millionaire, who seduced Mc to get revenge for what Mc did to his brother (with his father's help).
Look like our mc is very good at attracting the wrong kind of woman ^^