This episode is the reason No Guns Life works. The anime has been building to this moment for 23 episodes, and it pays off. The truth about Juzou's past is not heroic. He was a trapper, a Brethren Slayer who killed his brothers in cold blood. But he changed. He's been carrying that guilt for years, and it's made him who he is. The way he treats Tetsuro now makes perfect sense it's an attempt at atonement.