Avatar Roku the avatar before Aang

Roku was the Fire Nation -born Avatar immediately succeeding Avatar Kyoshi and preceding Avatar Aang. Roku's memory served as a guiding force for Aang throughout his quest to end the Hundred Year War.

Who is Roku in the Last Airbender?

Avatar Roku is a supporting character in Avatar: The Last Airbender. He was the Fire Nation-born Avatar immediately succeeding Avatar Kyoshi and preceding Avatar Aang. Roku's memory served as a guiding force for Aang throughout his quest to end the Hundred Year War.

Why did Roku take so long to master Avatar?

After mastering all four elements, Roku initially had difficulty to master the Avatar State due to his impatience. Over time, however, he was able to master it, becoming a fully-realized Avatar as a result. He was also Aang's mentor on his journey as the Avatar for several years.

How did Avatar Roku and Avatar Aang become the Dark Avatar?

Korra aided the Southern Water Tribe rebels against the then chief of both Water Tribes, Unalaq, and later killed him when he became the Dark Avatar. Both Avatar Roku and Avatar Aang had to combat a volcanic eruption. Roku fatally did so against the volcano on his island, and Aang against Mt. Makapu in Makapu Village.