Toph Beifong

Toph was an earthbending master, one of the most powerful of her time, and the discover of metalbending. Blind since birth, Toph wss constantly treated condescendingly because of her visual impairment, particularly by her overprotective parents. Upon discovering badgermoles, earthbending animals who are also blind, she learned how to use earthbending as an extension of her senses. This gave her the ability to "see" every vibration that passes through the ground.