I think the evil guy is the one who told blond hair not to get close to J in the flashback and he's the one conducting the experiments
Comment by Bob_ The Robber on The Hunter Wants to Live Quietly - Chapter 50
1 Reply
@Bob_ The Robber
Spoiler!
I fear ts might be a spoiler, idk, but yeah. He's just treating J as a tool for the monsters shown in the flashback