Echo is not a physically intimidating person, standing about 5.5' (1.7 m) tall and having a slim build.  Her unusually bright blue eyes are the most remarkable thing about her, offering a significant contrast to her dark brown hair, which she tends to keep short.  She is 26 years old.

A close observer might notice that her eyes never seem quite focused, but despite this she moves easily and gracefully enough as a rule.