Her father, Maduin has green hair. But both Terra, and her father have hair in the color of Teal, not green. And it wouldnt be so hard to distinguish Terra and Celes with blonde hair. Terra has a ponytail, Celes has waist length hair. No difficulty there. And their faces? Umm Terra wears a circlet, Celes wears no facial gear. Terra has pale jade eyes, Celes has either light blue or grey eyes. Terra is also taler than Celes by 2 inches, and Celes has a different body build, whereas she is a little more ripped (gotta look close), Terra is more softer in build. I wouldnt want to be on the recieveing end of Terra's roundhouse kick though. -Ouch- That's a couple of lost teeth.