Chara's face just seems to congeal into a 'what' expression, so at least that did something. (It's a different flavor of tight smile and wide eyes they don't break out often.) They recover admirably, placing their palms together, pressing them to their mouth and inhaling. That is an incredibly Frisk move and they really should have expected it.

They exhale, pointing their fingertips at the other.

"Do I get no say in this? Perhaps I like being this way." Even leaving aside the snarky, flippant, darkly-somewhat-joking contrarianism, they do have strong opinions on consent and personal control shaped by their past.

So it's a cold shoulder, but more of a standard level, 'such is interacting with Chara' cold shoulder.

"What, has the resident welcome-Frisk not swept you up already?"

Are they really that new?