which series does it belong to?
The Last Airbender
"Avatar: The Last Airbender"
Upon death, Avatar Roku was reincarnated and Aang was born, and later raised by Monk Gyatso, a senior monk at the Southern Air Temple and friend of the late Avatar Roku. Even prior to learning he was the Avatar, Aang distinguished himself by becoming one of the youngest Airbending Masters in history by inventing a new technique
is avatar aang in the legend of korra Yes. Voiced by D.B. Sweeney what exactly is this avatar? It is a fictional character and the protagonist of Nickelodeon's animated television series what is the personality like? He is a vegetarian, reluctant to fight and kill does he have any power? Yes. He can  easily overcome any opponent that tries to fight him. He can also use all 4 elements at the same time. which four elements are those? Air, water, earth and fire who created the character? Michael Dante DiMartino and Bryan Konietzko
UNANSWERABLE UNANSWERABLE "The Legend of Korra".
Aang
Introduction
Aang's character has appeared in other media, such as trading cards, video games, T-shirts, and web comics. Aang has also been portrayed by Noah Ringer in the live-action adaptation "The Last Airbender", and voiced by D.B. Sweeney in the sequel animated series "The Legend of Korra".
wiki:21645493
Aang [SEP] "Avatar: The Last Airbender"
Upon death, Avatar Roku was reincarnated and Aang was born, and later raised by Monk Gyatso, a senior monk at the Southern Air Temple and friend of the late Avatar Roku. Even prior to learning he was the Avatar, Aang distinguished himself by becoming one of the youngest Airbending Masters in history by inventing a new technique. As a result of Fire Lord Sozin's increasingly hostile attitude towards the other nations, the senior monks decided to reveal Aang's nature as the Avatar four years before the traditional age (Avatars are usually told of their status once they turn 16) and relocate him to one of the other Air Temples.