Terra Mythos (テアア ・ミーソス Teaa Miisosu) is a Sonic: Next Generation character. She is the future daughter of fan character Sepia the Satyr. She is an anthropomorphic 17 year old satyr and the older sister to Sienna Mythos. She inherited both her father's highly competitive fighting nature and his earth manipulation powers.
- Terra's name means "earth".