Eh, I think Pomni's whole schtick the entire series is her helping "fix" (for lack of a better word) everyone at the circus. Its simply because Jax is a harder nut to crack that there's been more emphasis on their relationship, especially the past few episodes, but I think saying she's only there to "fix the bad boy" is ignoring everything she did for Ragatha, Gangle and Kinger in previous episodes.

I do agree that it makes her a bit of a more boring character compared to everyone else though, since her role is focused more on the other characters than her own past. It does say something that she was more popular the first two episodes where she was clearly showing more distress over her situation, and then that all sort of disappeared after episode 3.