Chin has a unusual white complexion with black eyes. He wears a prison suit and has chains around his wrists and throat. He has long grayish blue hair with pink at the end.
As a thug, Chin cares only little about the people around him, except for those who he keeps dear. In addition to the former, Chin is shown to be reckless, as when he underestimated Subaru's physical strength.
Chin was born as Rachins Hoffman, a noble from Lugnica. However, after certain events, he left the nobility and started his life in the slums as Chin. Soon after, he met with his friends Ton and Kan.
After the Royal Selection Ceremony, Felt recruited Chin, Ton and Kan to join the Felt Camp. They accepted her offer, thus became participants in the Royal Selection. Since then, Reinhard van Astrea started to train all three of them so they would grow stronger with the help of his Divine Protection of Training Mastery.
Between the fourth arc and the fifth arc, the Felt Camp went to visit the Black Silver Coin organization. There, they met Doltero Amule, who appeared to be an old friend of Rom. It resulted in the Felt Camp receiving a gift from Doltero, which ended up being one of Echidna's meteor.
Later, the Felt Camp moved to Flanders, where a prostitute under the command of Totowas stabbed in the lung by a thin dagger. A young mage named Ezzo Cadner tried to save her with his magic, which ended up in not working. Meanwhile, Helain Gatness tried to gather information through Chin about something related to the Royal Family of Lugnica. In addition to this, she also tried to send a message to Rickert Hoffman for some reason. Eventually, Felt and Reinhard decided to recruit Ezzo for the Felt Camp.
Magic User (魔法使い Maho Tsukai): Chin is able to use Fire Magic.
- Goa (ゴーア): Chin manifests a blaze of fire which incinerates a foe, though the flame was noted to be rather underwhelming.
Equipment: Chin carries a knife with him that he uses to threaten people. However, he hasn't actually stabbed anyone before, causing him to be shocked when he stabbed Subaru in one of the failed loops of Arc 1.
Training: After being employed by Felt, he started to get trained by Reinhard and has developed considerable power.
- Ton, Chin, and Kan's names are a play on the Japanese word tonchinkan which means irrelevant or inconsistent.
- According to the author, Ton, Chin, and Kan don't play an active role after Arc 1 until Arc 8.