I wouldn't want to make him uncomfortable.

[Any more than Caster already is just by virtue of being Caster.]

Outside of Japan, I don't think I could be called famous. -Well, perhaps Micronesia, but that's about as far as I would imagine my name to be known more than the average writer.

Are you two friends?

[He seems to have a positive opinion about him, so surely they must be friends. Not just allies in a magical war, because that would be ridiculous.]