Foaming mouth guy

Foaming Mouth Guy was a resident of Kyoshi Island and was possibly the biggest fan of the Avatar. His real name, however, remained unknown.

History
Whenever Aang landed on Kyoshi Island island, Foaming Mouth Guy went into a screaming fit and started foaming at the mouth, punctuated by fainting and falling to the ground. When Katara and Sokka later returned to Kyoshi Island without Aang, who was being held prisoner in Chin Village at the time, Foaming Mouth Guy repeated the crazy performance, only to get up from the ground once he heard Aang was not with them, implying that the entire sequence is an act, or is perhaps an involuntary action that came with being in the Avatar's presence; he wiped the foam from his mouth and walked away with his jacket pulled over his head in embarrassment.

Foaming Mouth Guy had never been known to speak actual words, only crazed gibberish. Judging from the confused/embarrassed reactions from other Kyoshi Island residents, Foaming Mouth Guy seemed to be an outcast.

Trivia

 * A fan favorite, originally, the character was designated to simply faint in his scene, but an additional creative contribution from an animator named Ryu Gi Hyun took it further.
 * He was also referred to as "Crazy Foaming Mouth Guy", "Rabid Fanboy", "Frothers", "Foaming at the Mouth Guy" or just "Foamy" in the fandom, as his real name was never revealed.
 * He was played by the same voice actor as the pirate barker Oh.
 * A reference to Foaming Mouth Guy was made, when Sokka and Aang both foamed at the mouth due to disbelief at Katara's desire to pull off a scam.