Protagonist: Fang Haotian: calm, decisive, motivated and righteous. With his unyielding will and belief in pursuing the pinnacle of martial arts, he stepped from a small person to the pinnacle of martial arts and became the most powerful person to conquer demons and slay monsters.

The first heroine: Xu Yeyue, a genius in sword training, kind and chivalrous, broad-minded, able to accommodate all women who like Fang Haotian. No matter what difficulties Fang Haotian faced, he always stayed by Fang Haotian's side and eventually became Fang Haotian's wife.

Second heroine: Liu Ningyu. Fang Haotian's childhood sweetheart's first love separated from Fang Haotian due to a misunderstanding, but she still loved Fang Haotian deeply. She secretly protected Fang Haotian under the pseudonym Liu Ningyi, but was fascinated by the demons and turned her mind into a demon. In the end, he was rescued by Fang Haotian, and the misunderstanding was resolved, and he followed Fang Haotian openly.

The third heroine: Su Qingxuan. Existing in the sword realm as a soul body, he and Fang Haotian were both teachers and friends at the beginning. After spending many years together, she secretly fell in love with Fang Haotian. But in order not to ruin the relationship between Fang Haotian and Xu Yeyue, she reshaped her body and chose to leave. But fate dictated that she eventually followed Fang Haotian.

First supporting role: Tang Huohuo-Fang Haotian's sworn brother. Witty, righteous, informal, and cynical, he eventually became the second master after Fang Haotian and the guardian of the human race.

Second supporting role: Chu Xianhe - Fang Haotian's sworn brother, who got rid of the control of the demons with his firm will. After Fang Haotian retired from the world, he took over as the leader of the Yuanwu Hall and the leader of the Yuanwu Sect.

The male antagonist: Fang Wei - narrow-minded, self-esteemed, ambitious, eventually fell into the devil's path, became a big devil, and was eventually killed by the protagonist Fang Haotian.

The number one female antagonist: Nan Di - the eldest princess of the demon clan and also the demon clan’s think tank and strategist. She started to get close to Chu Xianhe in order to use Chu Xianhe to deal with Fang Haotian, but in the end she fell in love with Chu Xianhe. In the decisive battle between humans and demons, he died to save Chu Xianhe.