These next few are Blue Spirit-ized. Just can't get enough of Blue.
Cool
The grinning mask is hard and cool to the touch, but Katara knows that the face, the body, beneath it is warm (so warm).
Wrong
She waits until the two boys have fallen asleep before she sneaks off to meet another, and all the while her steps seem to echo accusingly what are you doing, where are you going?
Change
He is done with this mask, but it's not done with him, it seems; he's not sure if he's ready to tell her, show her and be rejected by her.
Hold
One night, he teaches her how to catch a firefly: gently, between the palms, as he guides her hands with his own while her back nestles comfortably against his chest.
Need
They both feel it: the need to rip it away so she can see and he can feel and they can move on, but Zuko knows better. There may not be any moving on after word, so it stays.