[At her comment on his confidence he looks down, shakes his head briefly - the very picture modesty even if the words that follow, if soft in tone, are entirely self-assured:]
I don't mean to sound arrogant. For a butler of my calibre a certain level of skill is required, however, and it would not amount to much if I didn't have the confidence to back it up. [He listens with genuine interest to her story, even looks amused by the dramatic pause. Sebastian's a fan of dramatically pretending to die when shot; he has a certain appreciation, shall we say, for needless dramatics. He politely hides a chuckle behind his hand.]
Very resourceful, miss Moriarty. As for weapons, I can certainly imagine guns being effective [19th Century firearms hurt like hell; he's not particularly eager to learn how much more painful they've become a hundred years later] although I haven't employed them against the monsters myself. These modern firearms are not something I've had much chance to practise with as of yet. The last time I went out, I carried an axe for firewood.
[So he threw it at the monster, right? Nah:] I ended up felling a tree on one of the approaching creatures, which proved quite effective.
[Now, a few other times he's had no weapon and ended up roundhouse kicking the creatures, but see? He'll answer a direct question.]