Mr. Barten

Mr. Barten (バーテンさん, Baaten-san) is a character in Majora's Mask. He is the owner and bartender of the Milk Bar in East Clock Town. During the day, he just hangs around in his bar sweeping the floor, allowing Link to stay as long as he doesn't get in the way. He does not permit entry to anyone into his bar in the evening without proof of membership, and refuses service to those who do not wear Romani's Mask inside. Mr. Barten considers himself as the kind of person who stays at his business no matter what, and as such, he is one of the few characters who do not flee town despite that the Moon is about to crash.

If Link talks to him on the night of the Final Day, Mr. Barten reveals that he was waiting and hoping that one of his favorite customers would show up. As such, he mentions he wasn't wrong since Link did stop in at the bar.

His equivalent character from Ocarina of Time is most likely Talon. Mr. Barten is much more melancholy and somber than his Hyrulean counterpart.

Trivia
His name seems to be the contraction of the word "Bartender".