Trevor is one of Duncan’s roommates and a fellow English PhD student at Duncan’s university. Trevor comes from a wealthy family known for manufacturing coconut cookies, though he does not like advertising this ritzy background. Trevor is a skilled cook and a dedicated host, even inviting Marian over for an elaborate dinner party. Alongside Fish, Duncan fondly—and dismissively—labels Trevor as one of his “understudy mothers,” caring for him the way his deceased parents cannot.