Kim Yu-Sohn

He was a retired mercenary at the rank of A his son was a knight that wanted him to quit being a mercenary but he was reluctant to quit the business as he has a grudge against the vampire then he met lycan (Kim Sae-Jin in wolf form) he helped him find vampires for him to kill after that when Kim Sae-Jin invited him to become his subordinate he accepted he also has the ability to see the future by seeing from the perspective of others he is also the first to know that Kim Sae-Jin can transform into many forms of monster he is the Chief of the mercenary guild that Kim Sae-Jin made and sometimes advice's him in what to do.

He wants his son to become life him so he can be of help to his boss Kim Sae-Jin because he is dying by being cursed by the vampire of yolk when he was still hinting them.