While I get her trauma isn't easy to get over, she also knows the person coming is the reason she was so "Useless" so I'm not sure why she keeps insisting she has no power. Also Younger bro is a reincarnator aswell yet not only does he seem completely acting like he did the first time around and also somehow treated her like trash the first time and is suprised she's a clear train wreck again after still treating her badly.I think everyone wondering at Sienna's anxiety needs to remember the timescale we're dealing with here. She spent years and years in her previous life being demeaned and ridiculed by the Nacht family, compared to, what, a week of her previous abusers being... completely different from her expectations.
Of course she's not over it. Of course she's always looking for the trap.
I for one am looking forward to seeing her learn to trust them this time around! <3