The ancient spirit would not give a straight answer in their encounter, merely stating that Tui and La were opposites (push and pull), and told the Avatar that he had already met the spirits. He also warned Aang of his malevolent nature and not to express any emotion in front of him. Roku first told him about Koh, since he was old enough to know Tui and La before their crossing into the mortal world. When Aang first meditated into the Spirit World, he sought information about Tui and La, the Ocean and Moon spirits. He could not go through with killing the spirit, however, as he realized that Koh's death would also result in the death of his lover. Kuruk spent the rest of his life hunting the spirit, and still hunted him well into the afterlife. She intended to marry him, only for Koh to steal her face as punishment for Kuruk's arrogance. Because of Avatar Yangchen's extremely successful tenure as Avatar which resulted in multi-generational peace, Kuruk did not have to do any work as her successor, leading to his a casual life and arrogant attitude. Koh is the nemesis of Avatar Kuruk, a Water Tribe Avatar and the third Avatar preceding Aang. Since his face is mutable, Koh does not have consistent hair colors or eye colors. By default, however, he has a white face with red lips. His face is an eye that can show another person's face, mainly someone who met him and then lost their face to his powers. Koh takes a lot of his design inspirations from a centipede.

Avatar the last airbender doodle