The unnamed sorcerer, described as a man wearing a cap, possessed a distinctive tattoo that may indicate his affiliation with the sorcerer group known as Hishaku, which Chihiro is searching for.

Young Chihiro spends his days training under his famous swordsmith father. One day he hopes to become a great sword-maker himself. The goofy father and the serious son--they thought these days would last forever. But suddenly, tragedy strikes. A dark day soaked in blood. Chihiro and his blade now live only for revenge.
 (Source: Manga PLUS)
 
Note: 
- Winner of the Tsugimanga 2024 Award in the Print Manga Category. 
- Winner of the 4th Magademy Commitment Award. 
- Nominee of the 70th Shogakukan Award.

Hishaku Youjutsu-shi