Milly Larsen is a female fourth grader. She speaks with a strong Southern accent in some episodes, mainly the newer ones. In "Erection Day", Red briefly referred to her as "Jessie", this was likely a simple continuity error. Milly is displayed as one of "the popular girls" in the fourth grade along with Wendy Testaburger, Bebe Stevens, Red, Lola, Esther, Heidi Turner, Annie Knitts, and Sally Turner.