Name: Lin Yan
Age: 23 years old
Identity: The last generation of credit knife dealers. When he was 10 years old, his parents were killed by a sword evil spirit for "violating the taboo of credit knife dealers". He only left behind a "soul-suppressing knife" full of strange patterns and a mutilated "credit knife deed". He grew up in a remote mountain village and was raised by a blind old woman (actually a retired exorcist). At the age of 16, he inherited the identity of a credit card holder and began to travel around, earning a living by crediting knives while searching for the truth behind his parents' death.
Personality: Indifferent and taciturn on the outside, sensitive and delicate on the inside. Having seen too many scenes of demons and ghosts harming people, he is both sympathetic and vigilant towards humans; he abides by the taboo of borrowing knives, but when encountering a situation where "the innocent will be backlashed by the contract", he can't help but help secretly; he has "yin eyes" and can see the true form of demons and ghosts. This is both his advantage and his burden - he is often entangled by the illusion of demons and ghosts late at night, making it difficult to sleep.
Abilities:
Basic abilities: control the soul-suppressing sword to slay demons and eliminate evil spirits, and can sense whether there are demons and ghosts around through the temperature changes of the blade (the lower the temperature, the stronger the demons and ghosts); can understand the ancient text in the "Credit Knife Contract" and formulate a suitable contract based on the customer's appearance and aura.
Hidden ability: There is a "yin and yang soul" lurking in his body (half is a human soul, and half is a "guardian demon soul" injected by his mother to protect him). When his life is in danger, the demon soul will temporarily awaken and gain powerful power, but will fall into a coma afterwards, and the power of the demon soul will gradually erode his human consciousness.
