i'll drop a couple of mine under the spoiler! cw for abuse / traumatic experiences / the like. it'll be blacked out tho.
// none of these are formally diagnosed in-story due to mental health fields being severely underdeveloped in the setting btw
Gregory has PTSD combined with an altered sense of self due to a brain injury. He also suffers from an eating disorder, less because of self-image issues but more so as a way to regain control over himself. He is also deathly hydrophobic. His fear of water is so bad that he is even unable to take baths.
Hala has postpartum psychosis, made worse by the fact her son was stillborn. She blames herself for not having been a good mother and wife. After labor, she became deeply depressed, confused, and obsessive over her husband and son. Her depression only grew worse upon divorce. In the years leading up to her death, she couldn't work properly.
Maribelle has PTSD as a result of both war time and abuse at the hands of her father. As a child, she was also very isolated, and didn't have any friends her own age, which is... very important for a developing kid. This left her socially underdeveloped, fearful, and unstimulated throughout her childhood.
Noel has depression and a mild case of PTSD as a result of war time. He is also an insomniac and an alcoholic, though of course this just makes the former conditions worse for him.
Otto has HPD. He prefers to be at the center of attention, and tends to make rash, impulsive decisions. And, again, because he is entirely untreated/undiagnosed, his illness really just... tears him up and gives him more reason to act inappropriately and harshly.