Don't worry about it, Haruhi! Pluto's not used to announcing her presence. Mainly because it's not usually necessary; if this place weren't suppressing her natural gravity, you'd know she was here from anywhere else in the building. She sort of has That Aura to her, even now; when she speaks, she doesn't speak loudly, but it's clear she expects others to hear her.

She chuckles a tiny bit at Haruhi's stammer - a fond noise, not at all a mocking one. "I wouldn't know! I've never been there." And then, as if that weren't a bit of a bombshell to drop, she just continues. "Mm... I do miss home, though. At least, I miss everyone that came with it."