Important Can someone help me with a psychological profile please?

Alright so I have a set of twins their parents were murdered. Jimmie witnessed his mother's death and was chased down to the room he shared with his twin. Twitch fought them and injured his back. Both the twins were stabbed several times and in the lower level of their home where they saw their father's corpse before the two along with their home were set aflame. They survived with serious injuries. Anyways that's what's happened to them what I need help with is the mental illness(s) they were diagnosed with as a result.

Jimmie

Is mute.
He acts like nothing happened and seems to have amnesia of it all. In general he acts like a young child innocent, immature, overly trusting. Though at night he has night terrors. Along with random panic attacks during the day and a issue with being separated from his twin and in general being alone. Seems to of partially disappeared into his own world.

Twitch

Is paralyzed from the waist down.(unknown if its temporary or not)
Has PTSD, panic attacks, night terrors. Has survivors guilt. He is protective of his twin and remembers it all. He has suicidal tendencies. Nervous and uneasy all the time and especially jumpy without his twin. He doesn't eat much and gets violently ill when asked to talk about it.