Troupe Leader's Mask

The Circus Leader's Mask is given to Link by Gorman at the Milk Bar in Majora's Mask. The mask, when worn, will calm angry people. The only time this benefits Link is during the segment of the game in which Link must defend Cremia's milk shipment to get the Romani Mask, as wearing the mask will prevent the attackers from attacking. Bizarrely, the Romani Mask is required to get the Circus Leader's Mask in the first place, and as there is no further reward for defending the milk shipment, the Circus Leader's Mask is essentially an utterly useless mask, being necessary only for obtaining the Fierce Deity's Mask.

Obtaining the Mask
After gaining access to the bar, Link meets Toto, manager of the Zora band the Indigo-Go's. After Link aids him by playing the pieces of music he requests using the musical instruments of each of his four forms, the man at the bar, Gorman, is moved by the tune. He gives Link the mask to show his gratification.

Trivia

 * This is the only mask you can obtain more than once.