When Gareki speaks up, Setsuna only realizes right now that he's been staring. (Hey, that's how fascinated he was.) He eyes away briefly, looking guilty of his act. But it's quick to disappear as he glances right back to the boy.]
Sorry.
[Though, upon closer sight, Setsuna also realizes that he's never seen this boy before. He must be a newcomer, then.]
... Rather, can I help you? [If Gareki really is new, he should be able to catch unto that statement.]