"Considering I just nearly blew your cover to half a dozen Death Eaters?" He smiles, and the brittle knife's edge of it matches his tone. "Exactly what anyone else would owe me, except that I'll not be charging you for that potion or anything superficial I recognize on your person."

It is parts comforting and concerning that he can look at Sebastian and tell just who left what, probably.

"Consider it a bribe, if that makes you more comfortable."

... There are no community college weekend courses on these things, after all. Hellsing would not approve of his methods of self-education.