Estalyn is small and slight, with light skin, sandy hair and green/grey eyes. Shorter than the average human (5' 6"). He has an expressive face which is far too good at showing his feelings. He wears red and russet clothes (when he has the option of chosing the colour), including a leather jerkin and a leather cap with a red feather (despite being arrested for this).

His name, which means Dark Star, is his only name. I (Jaine) don't see Sindarin as going in for gratuitous surnames or titles, and if someone needed to identify him at home, they would probably know his father, who is an inkeeper.