Yu Han

He first appeared as Long Hao Chen opponent, during his competition to become a Demon Hunter.

Han Yu expresses an arrogant attitude when first encountered early in the series, but after becoming a retainer knight of Long Hao Chen and joining Demon Hunt Squad 1, he changed a lot, became polite and remained calm during difficult situations and started to care a lot about his companions.

(Source: Shen Yin Wang Zuo Wiki)