Yen Sid

Yen Sid is a resident in the town of Storybrooke, who was presumably brought over during the casting of the Dark Curse. In Storybrooke, he is known as the landlord of the Apprentice.

Season 4
After Rumplestiltskin is banished from Storybrooke, the heroes are left to clean up what havoc he has wreaked. Belle and Hook work together at the library, doing research to find a way to free the fairies and the Apprentice from the Sorcerer's hat, and a bulletin board is put together with all the information gathered, which includes a stickies-note that details Yen Sid being the Apprentice's landlord.