Scorpius | Cassiopeia
I'm almost certain that he didn't leave intentionally. We've been trying to find a way to reliably send people home for some time, without success.
Oh, that's a great pity. I'm sorry that you didn't see more of them before. This place can be difficult. Before the school opened, I had Arcturus living with me for a time, and that was strange for both of us, but we made efforts to understand and to respect one another.