Brave’s Witch Is a Time-Traveling Boo
This is one of the more popular Disney theories, and we’re rather inclined to accept it. In 2012’s Brave, The Witch is a master woodcarver and leaves a carving that looks just like Sully from Monsters, Inc. Because of this, fans were quick to draw lines between the crafty character and young Boo. This theory says that Boo used her knowledge of magical doors to search for Sully. In doing so, she winds up in Medieval Scotland and brushes up on her magic.