Chebukki Siblings

The Chebukki Brothers are a mischievous trio of Tarutaru who appear in the Chains of Promathia storyline. They are not "brothers" per se, as one of them is a sister. They appear once your character has reached the Tavnazian Archipelago region (ie. Lufaise Meadows after you have cleared Promyvion Dem, Holla, and Mea) and steal your Mysterious Amulet key item while you are unconscious.