- Gizmo as Henry
- Starfire as Summer (both are voiced by Hynden Walch in the same voice)
- Beast Boy as Cobby (Chiara Zanni kinda sounds like Greg Cipes when she does Cobby's voice)
- Raven as Gertie
- Cyborg as Denzel
- Silkie as Beckett
- Jinx as Hildegarde (she only appeared in the episode Cobby & The Brain)
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