El Matadora (エル・マタドーラ)

El Matadora is one of the holders of the "Bestfriend Telecard" and member of The Doraemons. He didn't possess cat ears. Instead; he grow ox horns on his head, which usually poses unintentional threat to people around him.

He lives in 17th-century Spain; where he disguises himself by working as a dishwasher at a Gyuudon restaurant. Under the name of love, peace and justice, he transforms himself into his heroic alter-ego: Keikai-Dora.

(Source: Doraemon Wikia)