He always comes in to eat ALF's unfinished meal after coming in to the Tanners' house. In "Lookin' Through the Windows," he rudely took away all the corn and the plate holding the corn from the dinner table to his house. In "Strangers in the Night," he came in and took away ALF's pizza. In "Moving Out," he ate Willie's cream cheese Danish. In "Breaking Up is Hard to Do," he ate some of ALF's plate of ham and eggs. The Tanners have the right to somewhat sue him but never even confront him, although this could be that they want the Ochmoneks to leave immediately fearing they might see ALF or the Tanners don't have much ability to confront people.
Although it is unknown what Trevor does for a living, it is known that he was a pilot during the Korean War. However, the Korean War took place from 1950 to 1953 while this show is set around the late 1980s, which means Trevor's age is at least somewhere around his 50s to 60s. Trevor was also a high school football quarterback for seven years. Once Trevor's glass eye is accidentally broken - it is uncertain whether Trevor is actually missing an eye, but it is known that he was injured during the Korean conflict. It is also known that Trevor once pursued a master's degree in art history, but it is unknown whether he completed the degree.
Trevor is allergic to shellfish, but occasionally indulges in it nonetheless. Trevor drives a Plymouth Duster.
Trevor at times mentions Korea, for example, in "La Cucaracha," he said cockroaches were everywhere.
Trevor appears to be left-handed.