The Yun brothers (ユン兄弟 Yun kyōdai) are two brother mercenaries who participated in the bounty hunts for Hänsel and Gretel and Jane.

The two brothers are skinny adult men with pale skin, and their faces are never seen. They both wear dark-purple motorcycle helmets with a dark-brown motorcycle tracksuit. They each use a MAC-10 submachine gun for a weapon.

When Hotel Moscow put out a $50,000 bounty on Hänsel and Gretel for several murders, the Yun brothers were one of various mercenaries who participated in the hunt for the twins.

Sometime later, when the Nuevo Laredo Cartel put out a $1,000 bounty on Jane, the Yun brothers drove to the Yellow Flag and parked their motorcycles right outside, meeting up with other bounty hunters. Inside, they sat down at a table and listened to Russell inform everyone about the physical description of Jane and her whereabouts at the Ramsap Inn. After the bounty hunters learned of the details, they headed to the Ramsap Inn, with the Yun brothers allowing Quentin the Tiger to ride with them on one brother's motorcycle. At the motel, several bounty hunters confronted Jane inside but failed to capture her because of Eda's escape instructions. Subsequently, the Yun brothers and the other bounty hunters drove into the adjacent alleyway, where they saw Jane being escorted into Benny's car. The two brothers stopped near the car and remained silent as Quentin tried to convince Eda to turn over the wanted woman for her bounty. When the nun shot Quentin in the chest and declared that she was Jane's recently hired bodyguard, the Yun brothers briefly chased the group and shot at them. Revy and Eda shot back at them and hit their motorcycle tires, causing both men to crash. The brothers were not seen for the remainder of the pursuit.