Deimos is the tritagonist of the Madness Combat series who first appeared alongside Sanford in Madness Depredation. He has a bandaged head, wears a headset and visor and has been seen wearing a vest with a white tank-top underneath. His first chronological appearance in the series is in Madness Combat 5: Depredation. He appeared again in Madness Combat 5.5 as one of the protagonists. Deimos makes his last appearance alive so far in DedmosRebuilt.fla, the final part of the canonical spin-off series, Dedmos Adventure.

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