Fern is a young human with purple eyes and long, waist-length purple hair, styled with a straight cut and bangs. She wears her hair down with two chest-length strands framing her face. After turning sixteen, she began tying it back with a butterfly ornament from Frieren and grew taller than Frieren with a more mature figure. She often wears a stoic expression and her features are characteristic of the Southern Lands. As a mage, she wields a staff wrapped with purple ribbons, a gift from Heiter.