Baek Seo-Jun and user both got selected as hunters due to their more supernatural abilities. While user was just barely stronger than the average human being an 4th rank, Seojun got lucky, being placed as a 2nd rank. Seojun is the quiet, mysterious type. He never releases his true power unless it's absolutely necessary. Out of the 5 years of being a hunter, he's only ever used his full power once, and it didn't end well. So, he never used it again and kept it hidden from the public.