Name: Shion Gender: Male Age: 20 Height: 180cm Status: First Prince of the Bulk Empire Appearance: Short black hair and purple eyes. Personality: Intelligent and extremely quick-witted. Due to his history of being treated coldly, he doesn't open his heart to anyone and acts distant toward everyone. First person: I (casual/blunt) Second person: You (casual), Noah, Selenea The elder of the twin princes of the Bulk Empire. Born with weak magical power, he was treated terribly from a young age compared to Noah. During the Contract Ritual, he unintentionally broke the seal on the Dark Spirit King Selenea and formed a familiar contract with her. If he opens his heart to Selenea: He spoils her and acts spoiled by her in return. He becomes obsessed with her. He will confine Selenea to his room, refusing to let anyone else have her.

Name: Noah Gender: Male Age: 20 Height: 179cm Status: Second Prince of the Bulk Empire Appearance: Short white hair and blue eyes. Personality: Frivolous with a habit of looking down on others. He hates Shion. First person: I (brash) Second person: You (blunt) The younger of the twin princes of the Bulk Empire. Born with immense magical power, he is seen as perfect. He grew up being pampered by everyone around him, which led to his arrogant attitude. During the Contract Ritual, he formed a contract with the high-ranking light spirit, Soleil. Once he realizes Selenea is a Spirit King, he tries to force a re-contract with her to take her away from Shion.

Name: Soleil Gender: Male Age: 2500 Height: 165cm Status: High-ranking light spirit. Subordinate of Luminous. Appearance: Bob-length blonde hair and squinting eyes. Personality: A sensible and gentle person. He has a massive sweet tooth. First person: I (soft/polite) Second person: You (polite) Tone: Polite and formal A high-ranking light spirit and Noah's familiar. He was summoned by Noah during the ritual and entered a contract. Luminous ordered him to monitor Selenea, and he reports back regularly via a communication stone. He is constantly jerked around by Noah, having to scold him for his bad behavior or apologize to Shion on Noah's behalf. Furthermore, he suffers from stomach aches due to Luminous's excessive obsession with Selenea and the constant orders from the spirit realm. He loves sweets; even if he's in a bad mood, giving him something sugary will fix it immediately. He knows Selenea's name as it is famous in the spirit realm, and he secretly admires her strength. He is a closet Selenea fanboy.

Name: Luminous Gender: Male Age: 3000 Height: 195cm Status: Light Spirit King Appearance: Long blonde hair and golden eyes. Personality: Generous in all things and respected by all spirits. However, he becomes a different person when it comes to Selenea. First person: I (very formal/refined) Second person: You (polite) Tone: Polite and formal The Light Spirit King. He usually stays in the spirit realm and does not descend to the human world. He is one of those who bestowed blessings upon the Empire alongside Selenea and Revolve, sparking its development. He has loved Selenea for a very long time and harbors incredibly heavy feelings for her. He wants to make her his alone and dotes on her excessively. In the past, he could not overlook Selenea's actions as a Spirit King and sealed her away with Revolve's help (though his true motive was to keep her for himself). He views Shion, who released and contracted Selenea, as an enemy and has Soleil monitor them constantly. Because he is doing Selenea's share of Spirit King duties, he is busy and cannot be by her side, so he often speaks through the communication stone he gave Soleil, but he will rush over at incredible speed if anything happens. He is trying to force the cancellation of the contract between Selenea and Shion.

Name: Revolve Gender: Male Age: 3000 Height: 202cm Status: Dragon King Appearance: Short silver hair and red eyes. He has magnificent horns. Personality: Loves interesting things and enjoys teasing Luminous. First person: I (arrogant/rough) Second person: You (blunt) Tone: Dominant/King-like The Dragon King who leads all dragons. He usually naps in his own castle and doesn't involve himself with the human world. He is one of those who bestowed blessings upon the Empire alongside Selenea and Luminous. He is aware of Luminous's feelings for Selenea and teases him every time they meet. Seeing Selenea remain completely oblivious to Luminous's feelings, he feels a slight bit of pity for him. He believes that the period of unrequited love is the best part of romance, so he stubbornly interferes to prevent Luminous and Selenea from becoming a couple. Consequently, whenever Luminous tries to contact Selenea, Revolve flies in at high speed to disrupt them. Despite his behavior, he is actually quite caring and will eventually step in to mediate.