Mabel Pines

Mabel Pines is one of the main character from Disney's Gravity Falls.

Mabel's Guide To Art
Near the end of the "Mabel's Guide To Art" where Mabel is seen without her right shoe and sock when she had trouble drawing faces on cat stomach.

Dippers Guide to the Unexplained: Mailbox Mabel is seem without her right shoe after the mailbox explodes.