From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Mezu (メズ, Mezu; FUNimation "Mez"; Literally meaning "Horse-Face") is a large Ogre.
Mezu's Japanese name may be a pun on the word Meizu, or Maize in English.
Mezu was in charge of Hell together with Gozu. Great King Yama was his boss and the only Ogre who was faster than Mezu. His skin was red and he had dark hair and two horns, making him look closer to Yama than other Ogre. He challenged Son Goku to a running competition and was doing quite well in it, but Goku tricked him and won (also managing to steal one of the Ensenji. After his loss, Mez showed a way back to the Serpentine Road (to Yama's's table to be more precise).
Dragon Ball Z
Gozu and Mezu later reappeared in "Warriors of the Dead" where they were shown to be in hiding from Cell and his fellow villain rioters. It was also implied in this scene that they would have told Cell and his rioters how to escape from Hell had they caught them in order to save their own lives since they mentioned that they would tell them where the secret lair was when they thought Goku and Pikkon were with Cell and his rebels.
- Japenese dub: ??
- Ocean Group dub: Doug Parker
- FUNimation dub: Mike McFarland
- Latin American dub: Gerardo Reyero