Assassin will do. [ He's certainly introduced himself with that title. He's not the only Assassin here, but names were never important to him. He doesn't even remember the one he was born with: a nameless ghost, given a vessel of a class, given a name of a hero that never existed. ]

Either way, there's no need for all three of us to keep cutting at these snakes. But I'm no chemist or craftsman, so I'll volunteer for beheading duty, if that's fine with you, Assassin?

[ He looks over his shoulder at the other Assassin, choosing to use that over Henry's true name for no other reason than that it amuses him right now. For all Kojirou's a master swordsman, Jekyll is the scholar here. Strange languages, poetry, chemistry, and arts and crafts, he'll leave all of them to him. ]