Well, if you can’t beat a boss.
You can either change your strategy or change the frontliner.
You can level up by going to conquered districts and looking for trouble.
But it’s not going to get you that far since it only raises HP and WP.
Other stats are raised (or lowered) by story events.
But as a base, Chloe is a lot stronger than the MC at the start. And in my case, I used Hazel against Ophelia and Rachel.
Also the strategy thing. Rachel is very difficult to seduce. And Ophelia is pretty much impossible.
So there’s that.