Chad Caswell, full name Charles Caswell III, is the supporting character of Clarence, who is the boyfriend of Mary Wendle and stepfather of Clarence Wendle. He is voiced by Eric Edelstein in Seasons 1 & 3, then Skyler Page in Seasons 4 & 7.
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He lives in the Wendle household with his girlfriend Mary and surrogate son Clarence. He once had a band under the name Dogmön and has a bachelor's degree. His parents were very laid-back and calm people unlike his girlfriend's parents.
Unlike Mary, he is the more of the "fun-parent" type to Clarence.