Suuriin  

, スーリィン

A powerful thunderbird with a court rank of 4 has a playful personality and disguises itself as a small bird while living in the human world. If someone were to forcefully summon her, it could result in hundreds or thousands of humans sacrificing their lives. Despite this, she was bought by a seven-year-old boy named Joshua Break as a pet at a marketplace. In order to save him from almost certain death, she formed a marriage contract with him. Due to the high amount of life energy required for her physical form, she usually resides in Joshua's pendant.