The military

"WHERE IS MY SOUL ORB??? WHERE THE FUCK IS MY SOUL ORRRRRRRRRRRBBBBBBBB...???" Brook roared in anger. 

His eyes were red with wrath. His hairs were standing uptight. Teeth gritting. There was a big scar on the left side of his face making him look even scary.

Jace trembled in fear looking at his wrathful boss. Whenever his boss gets angry, something bad happens. 

Unlike other military officers and lieutenants, his boss is way more ruthless. 

Killing and slaughtering criminals for his own sake. 

Taking his own subordinates' achievements and making his position in the military even more secure.

Not to say collecting sinners' souls. If by any chance the military or other Underworld forces realized this, then only death will await them.

Jace gulped and tried not to run away in fear as he spoke, "B-B-Boss, E-Evan is in Sector-D. We can't go there and search. It's not our area."