Thinking about it, what about the second floor? Most of them are, while not "normal", not really traumatized or abuse victims, at least by the more common definitions of it.
I had a much longer breakdown of individual trauma's for each character, but Moonflare's post went up when i was nearly done and covered most of the bases. So now I'm just expanding on the ones that needed more of a breakdown.
The Tsukioka's trauma is generational. Touka's the eldest daughter of a wealthy Japanese man with no sons. This means that she does not get to make her own choices. Her role is to be perfect and desirable so that she can be married off to an executive's son, who will then be adopted by the Tsukioka's and inherit the business. Her husband will be the Tsukioka heir, not her. Her job will be the Foundation. She already knows that her future husband (who will be chosen for her by her father, as it's a business decision) will be making decisions on her behalf.
Tsukasa laments being the "spare," if something happens to Touka, Touka's burden falls to Tsukasa. If Touka marries, Tsukasa is free to pursue her own goals, but right now she's in limbo. Touka, however, will never be free of that obligation. She will never be free to walk her own path.
Tsubasa grew up in the same situation, and knows the harm it did to her, and this is why she's trying to give Touka some room to breathe and make fun mistakes, because she's come out the other end of it and her life has very little joy in it because of that pressure.
Now, moving on to Otoha -- her parents are hyper-controlling. She's afraid to be herself around them. They've given her no room to breathe and grow. From experience -- this does a lot of long-term damage. A lot of people wind up in therapy as adults because their parents were like this. So it is a form of trauma, but it's not really conveyed well in-game.
Imani - Raped, burned, betrayed, tainted. It's like Selebus was trying to check a lot of boxes with this one, I thought it was too much tbh.
While it IS a lot, I think it's based on something that actually happened, or is at bare minimum 2-3 stories of real people thrown together. When you start digging around in the "revenge rape" rabbit hole, shit gets dark super fast. She was essentially used as an example to other women "do as we say, or this happens to you."