Ha, no, we simply spar together.

[He hates to disappoint Manabu here, but-]

I'm simply regarding him with the respect he deserves, as head of the Ragnvindr family. It's no different than anyone else addressing me as Lord Harbinger or Master Childe. I just don't require it of anyone who isn't Fatui, hahaha.

[He grins dangerously now, eyes flashing.]

Besides, I'm sure there's a thing or two I could teach Master Diluc yet. I wouldn't get our roles confused here, now.