Safe and Loved

At school this sort of mood was normally triggered by a bad letter from home or an argument with his brother, but since the war it happened seemingly out of nowhere. The healers at St. Mungos had kept Sirius for observation after he had been initially sent to Azkaban for a matter of several weeks until the truth came out about Peter and Sirius was released. They said that PTSD was normal for anyone with involvement in the war, but Sirius - who had always had shoddy mental health to begin with - had witnessed far more than most.