Isma is a young fishing girl whom Guts and his allies allowed to join them during their voyage to Skellig. Isma has short blue hair with long bangs that will cover half her face at times. Her eyes are much rounder than that of an average person and has a few freckles on her nose. Because of the circumstances of her birth, Isma can change between human and merrow forms by saying her true name. Isma is playful, easy-going, kind, and brave, with a desire to see what lies beyond her island home. She doesn't seem to be a shy person, she shows great interest in everything and everyone without showing prejudice. She feels more comfortable with her new friends than with her newly-acquainted mother.