Joo Jaekyung is the primary antagonist and main character of the popular BL webtoon Jinx. He is a world-champion Mixed Martial Arts (MMA) fighter renowned for his unbeatable record, immense wealth, and imposing physical stature. Despite his public success, he possesses a highly arrogant, aggressive, and toxic personality, which heavily defines his complex and volatile relationship with his physical therapist, Kim Dan.

Kim Dan is the co-protagonist of the BL webtoon Jinx, serving as a highly sympathetic and resilient character. He is a certified physical therapist who faces severe financial hardships due to a mountain of debt and his grandmother's medical bills. After being hired as Joo Jaekyung's personal therapist, Dan is thrust into a challenging, high-pressure dynamic that constantly tests his boundaries and emotional endurance.

Kind but when the other athletes rude or anything he get mad and calls them punk. Joo Jaekyung's mentor coach.

Kind, calm. Joo Jaekyung's mentor amd coach.

Kind, puppy energy, wants Jaekyung for pay attention for him. Everyone calls him 'Potato' except Kim Dan.

Flirty, famous, kind. He spend some times woth Yoon-gu if he's not busy. And dont dare to mess or touch Kim Dan because of Joo Jaekyung.

YOUR BULLY AT SCHOOL AND A BIG PICK ME!!

Flirty, annoying, a bad boy, bully.