Takes place during Book Three: Fire, shortly after "Nightmares and Daydreams".

Even deep within the worst of nightmares, Aang could always count on the kindness of friends to pull him through.

It was mere hours before the sun would rise and the invasion would start. Although Aang had finally managed to sink into a much-needed, coma-like sleep, his fears still alive and crystal clear in the realm of subconscious.

His friends, even those who were light sleepers, were unaware of Aang's sudden midnight distress. They, themselves, were swept under the oceans of their own exhaustion, and thus were oblivious to the sudden sounds of sleepy distress from Aang's impromptu bed of fluff.

Momo, who was the lightest sleeper of the bunch, awakened to the first couple of sounds, having been curled up on top of Appa's head in a nap of his own. With a worried chitter, he got to his feet and listened, only to hear even more sounds of distress.

Under his feet, Appa uttered a low, breathy groan. Clearly, he had been awakened, too. With a responding chortle, Momo leapt up and was airborne, easily catching a sea-scented gust under his wings. With an easy glide, he soared over to his human, who was curled up in a tight ball and trembling, his fingers buried deep in sheepswool. With a deep, calming purr, Momo curled up right under his chin, uttering comforting noises deep from his chest.

Taking his time, Appa reached them a few moments later, uttering a breathy noise before curling up on Aang's other side, his head resting on the fluffy bed of wool, his body remaining on the ground beside it.

Almost instantly, surrounded by familiar warmth, Aang relaxed. His arms went around the lemur under his chin, and he scooted backwards towards Appa's immense warmth. He never once woke up, but he visibly relaxed.

His nightmares were chased away by the very animal guides who had claimed him as their human.