Romani's Mask

The Romani's Mask is a mask worn on the head, rather than the face, and looks like a cow. It can be earned in Majora's Mask by helping Cremia make a delivery to town. The mask signifies that the one wearing it is a member of the Milk Bar, and an adult. While wearing the mask, the members-only Milk Bar will see that Link is a member, and will allow him to enter. This is useful many times, and is necessary to obtain masks that require Milk Bar access, such as the Circus Leader's Mask.

Obtaining the Mask
To obtain the Romani's Mask, Link must visit Romani Ranch before 6:00 PM on the Second Day and have completed the sidequest to protect the cows from Them with Romani. This will require a bow and access to Powder Kegs. Cremia will ask if he wants to ride with her into town while she makes a delivery. On the way, they are forced to take a detour through ugly country because of a fence blocking Milk Road. Link defends her milk supply from bandits who wish to destroy it and she delivers it to the Milk Bar. If at least one bottle of milk remains, Cremia will reward Link with the Romani's Mask.

The Happy Mask Salesman calls it a "sentimental item." This is certainly true in the case of Cremia, who promises to make Romani her own mask now that she sees her little sister has become an adult.