Hongjin is King Changshan's closest aide and most influential figure in Shanxi.[1] He used to work as an imperial eunuch, before rising to the 2nd rank position of provincial official.[2][3]
Mukyung describes him as a bastard who's as gross as an insect, and that one needs a strong stomach to interact with him. He has a cunning tongue and a penchant for trickery. Leepung claims that he is a treacherous and greedy bastard who covered the eyes and ears of his highness.[2] Wipeng did not expect him to be so frivolous.[3] Taekyung doesn't know if he should consider him honest or shameless for admitting he also likes bribes, though he criticizes a colleague for their excessive greed.[1]
He decided to become an eunuch and was resolved enough to be castrated, in order to help his family who were starving to death. Ever since he has had no intention of living with integrity. He is King Changshan's closest aide and most influential figure.[1]
Eunuch Hong has expressed that he's attracted to Taekyung, which gave him the shivers.[1] Mukyung claims that when he touches his shoulder during his luncheon, he was so close to breaking his arm.[3]