Laplace

After committing an unforgivable crime, Laplace was banished into a nightmare. After many years of suffering in the dreamworld, he escaped by killing himself. However, when he woke up, he could not remember who or what he was.
Laplace believes he is an angelic being. He has sadistic and cannibalistic urges from his older self, yet due to the amnesia, he doesn't understand why he has those tendencies and is very afraid of it. He remembers very little of the nightmare, and does not go to sleep due to a gut feeling that fears dreaming.

Both pre-amnesia Laplace and present Laplace are almost constantly nervous. The only difference is how they cope with it.