Jezzie is a student in the FAYZ living at Lake Tramonto. She is said to be an 'emo girl' and is a close friend of Sinder's . She helps Sinder grow vegetables using Sinder's green-thumb powers in the garden near the wall, and is one of the first to notice the black streaks growing on the FAYZ wall. Of the series she appears only in Fear and is very briefly mentioned in Light.
It is mentioned in Light that Jezzie was killed in the lake attack caused by Gaia, and Sinder mourns that all her friends and her best friend, Jezzie, were killed in the Lake Tramonto Massacre. Jezzie never actually appeared in Light, she was only mentioned.