"I am not your arbiter; I cannot do everything for you." An empty stare communicates irritation just as much, if not more than, a slight tonal twist, and requires significantly less effort.

It also allows a steady eye on their partner in conversation, as he focuses on the discs the pair of children wear. One of which Chara has seen activated in combat, once, though not in any fatal sense.

"Ask them yourself, given that you're so terribly interested."