Otaku

Otaku was an Air Acolyte who received airbending abilities after the events of Harmonic Convergence in 171 AG.

History
Otaku was an Air Acolyte trained and raised to preserve and maintain the barely extant nation. Some time after Harmonic Convergence, he gained his airbending and began learning how to control his bending at the Northern Air Temple under Tenzin's tutelage.

Otaku was the only one who knew the answer to Tenzin's question and was enthusiastic about answering any and all questions regarding Air Nomad history. Though Tenzin fished for answers from other students, Otaku persisted until the Tenzin finally leaned and allowed him to answer.

Personality
Otaku is enthusiastic about his new abilities, being an Air Acolyte who has extensive knowledge of the Air Nomads. He is a bit of a know-it-all, and stubborn to back down from sharing his knowledge.

Trivia

 * "Otaku" is a term used in Japan to indicate a young person who is obsessed with a particular aspect of popular culture to the detriment of their social skills and shunned by society. The term is usually associated to avid fans of anime and manga worldwide.
 * Unlike other male Air Acolytes, Otaku doesn't have a shaved head.