Isaac is a boy who lives in Danville. He seems to be a twin of a specific boy. He is a counterpart of Isabella Garcia-Shapiro. He once danced with Patricia in the Ballroom Dancing Contest during The Prom (Another Story). They won the trophy and he hugged her for teaching him to dance. He later made a cameo in Mind over Dark matter. Like his twin, he was voiced by Paul Butcher, later replaced by Darrelle Jed Montojo.