Toph knows Ouka must be following because she can hear the crunch of snow and ice crystals behind her, the scrape of another mitten on the railing that Omi helpfully added.

She also hears Sokka's reassurance, and Omi's response which, from the sound of it, seems like Sokka's words may have had the opposite intended effect.

"That doesn't make me feel better." Well.

"Hey," Toph says loudly enough for the boys to hear. "Relax, will you? We're just going up to have a chat. Girl talk. You boys can join in a minute."

Ship-trashing will happen and in good time, but first things first: Real Talk with the judgy girl, because you don't talk that way about Toph's friends. Especially not Sokka.