[It's bound to come up. Given that they're both in Enma, it's a matter of time before Soma knows what he is. Better give it to him on his own terms first.]

Oh, my apologies. As I'm a spirit, I don't age like a regular human, you see.

[Any more specifics, and it'll likely move a little too close to his identity. He'll stick to being very general, very broad in answers.]

Despite my looks, I am pretty old. I'm likely not the only one around here like this, youthful yet very old in age. I just happen to feel old from my long life.

[He glance around. No one around, just a quiet area for them to walk through.]