Supervising producer Ki - Hyun Ryu then designed the character based on Konietzko 's initial concept , with Konietzko adding minor tweaks to the final design .
Co-creator Bryan Konietzko drew the first concept art for Tahno in 2010 .
Supervising producer Ki - Hyun Ryu then designed the character based on Co-creator 's initial concept , with Co-creator adding minor tweaks to the final design .
Co-creator Bryan Konietzko drew the first concept art for Tahno in 2010 .