She is of medium-build, often wears a tent-like dress (which gives her a dumpy appearance), and has a shock of flyaway grey hair, a wrinkled smiling face, and the bright blue eyes of a White Witch. Zelda is a White Witch and therefore has considerable knowledge of White Magyk as well as Magyk in general. Throughout the books she has also shown a penchance for Potion making by either making them or maintaining them. She has absolutely no sense of taste and cooks dishes mainly consisting of cabbages and eel. The only other person who appreciates her cooking is Septimus and Petroc Trelawny.