The bow is offered with all the aplomb of someone well familiar with vampire etiquette - which Sylvain can recognize, being from the heart of the Gold Court, where things like that are of the utmost of importance. Survival skills, basically.

Although this is the first time he's had such a bow directed at him, because he is just a human and not even a full novice yet. So he's taken off-guard by the cheerful blond who looks at him earnestly, earning a bewildered blink or two before he laughs and rubs a hand against the back of his neck.

"Uhh, I guess so? Probably not as much as some. I'm not actually here to start today yet, just to observe. Are you here for your initiation?"

And then realizing he'd skipped a step in his surprise, he casts the boy a crooked grin and offers him a playful bow, with all the decorum one would offer a vampire Master.

...Hopefully that doesn't accidentally offend any vampire masters around here.

"Sylvain Gautier, at your service."