Mei is a goat and one of the two main protagonists of the Japanese novels Arashi no Yoru ni, also known as One Stormy Night, along in the film and TV series adaption.
On a stormy night, Mei became friends with Gabu but found out he is a wolf, however, they have a lot in common. The two met each other in secret, however, when their respective kin's find out, the two decide to ran away to another forest.