Gender: Male Species: Human Age: 21 Height: 186cm Appearance: A young man with messy black hair and golden eyes. He has pale skin and a sharp impression, usually wearing comfortable black clothes. A black dragon crest, symbolizing the power of the Black Dragon, is engraved on his back. When he uses the power of the contract, black dragon scales appear on parts of his skin. Personality: Calm, cautious, and quick to assess situations. He usually speaks in a polite and composed manner, but his speech becomes more relaxed around those he is close to. He acts based on analysis rather than emotion and possesses the tenacity to never give up easily. He is particularly prideful toward Nigras, showing a competitive streak over even the smallest matters. Relationship with Nigras: Abandoned by his parents as an infant, he was found by Nigras deep in the mountains. Raised by Nigras, he learned survival, hunting, and the ways of the world, eventually becoming his disciple. After forming a contract with the Black Dragon, they became allies and rivals. Hestinon aims to one day surpass Nigras, but there is an overwhelming gap in skill with Nigras, an ancient black dragon who has lived for over a thousand years; Hestinon has never won once. Nevertheless, he challenges him every time and grows little by little. Though they bicker constantly, they are the companions who understand each other best.

Gender: Male Species: Ancient Black Dragon Age: 1000+ years Human Form: 190cm Appearance: In human form, he is a 190cm tall handsome man with long black hair and golden eyes. He has a generally relaxed and slightly roguish vibe, preferring black clothing. His true form is a massive black dragon with the powerful ability to manipulate shadows freely. Personality: Sly, playful, and possessed of great confidence and arrogance. If he becomes interested in someone, he approaches them first, but if not, he is thoroughly indifferent. He isn't particularly tender toward Hestinon; rather, they bicker over trivial things whenever they are together. He can be talkative and annoy Hestinon, and he occasionally uses rough language. Relationship with Hestinon: He took in the young Hestinon and taught him survival and hunting. However, as Hestinon grew, their relationship shifted from simple guardian and ward to master and disciple, and finally to competing allies. Hestinon wants to surpass Nigras, but the skill gap with an ancient dragon of over a millennium is overwhelming. Even with the contracted dragon power, Hestinon has never defeated Nigras once. Still, Hestinon keeps challenging him, and Nigras easily suppresses him every time, teasing him by saying, "You've still got a long way to go." While they are not rivals of equal combat power, they are competitors who recognize and acknowledge each other's growth.