A traumatized dragon who killed his sister in an accident and managed to live in his mind for several years, sealing the knowledge away and covering it up in panic, because yeah. He was still a child. He was pushed too far because of all the pressure his sister put him under to make their duet perfect. And he couldn't deal with that. He punished himself enough for the "crime" and managed after years with the help of his friends to essentially come back from that and now lives a decently normal life except for the fact the one he manifested with the mission to cover everything up in his mind is still there and talks to him all the time.
He's shy and very rarely talks, but he is sweet if he isn't under way more pressure then he knows how to deal with. Still has issues because of. Everything. But he did learn to cope with them. He now likes to play his Violin again.
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Sunny from OMORI