Because of the setting and skills
The ghost-cut background story in The Master of Yin and Yang is like this. The famous Dao Ghost Cut was once the most powerful demon-cutting weapon in Genji family, and there is no one. Ghost cut once regarded Yuanlai Guang, one of the strongest teachers of Yin and Yang in Genji family, as its lifelong belief, so he faithfully guarded the family and loved Yuanlai Guang. Minamoto No Yoriie's Yuan Laiguang is the founder of Ghost Cut and one of the most famous teachers of Yin and Yang in Kyoto. Yuan Laiguang's personality is somewhat arrogant and ambitious. He pursues the ultimate strength when studying Yin and Yang, and once Yuan Laiguang launched the monster retreat for many times. In a great retreat, the famous knife ghost cut off the fatal blow of the ghost king for Yuan Laiguang, but later when he cut off the ghost hand of the ghost Ibaraki douji, he found an amazing truth. However, Ibaraki douji we saw in the game is still in a broken arm state, which also shows that Ibaraki douji failed to get his arm back successfully. However, the spirit behind Ghost Cut has an arm, so it is not surprising that we can think that this should be Ibaraki douji's failure in the process of getting his arm back, and Ghost Cut also feels betrayed and cheated because of his failure, which leads to blackening. However, because the game has no Watanabe, the famous knife Ghost Cut should transfer hatred to Yuan Laiguang, so the phenomenon of blackening has occurred. Blackening made him irritable.
His skills of ghost chop, ghost blade and ghost flash are very aggressive, and his original attribute setting is also very aggressive.