[He takes some time to respond; he has to think on how he wants to answer that. How does he explain Joker? The others had the Shadows, but that was atypical - creations of rumors. Joker... Joker was all him. Stupid, misguided him.]

Just because this power is part of you doesn't mean it isn't still a personality. Losing track of yourself or denying yourself will bring a response, and a change. I don't know all the possible ways it could go wrong.

What I do know is someone important to me died because someone lost himself and misused his power.

[Hopefully dancing around the whole truth like that is...enough. He's not okay with it, but trying to warn others away from the mistakes he made is more important than his own comfort.]