Cargo
Tasked with ensuring the safety of the summer camp students... how exactly was the Guardian Shadow supposed to pull that off? They were severely understaffed.
If it were just a simple training exercise in the Ninth Abyss, it wouldn't be a problem. But with the passage to the Fifth Abyss opening and a horde of Supreme Abyssal demon creatures on their way, things were bound to get messy. The Guardian Shadow wouldn't have the resources to handle everything.
On top of that, Mike still needed to find an opportunity to eliminate the Progenitor of Ghosts.
"Fourth Bro, there's no point getting worked up," Shadow Five said, trying to ease the tension. "That's just how the Arbiters operate. Reasoning with them is futile."
This first encounter with the Arbiter had given Mike a taste of their decisive, no-nonsense approach.
The decision was made, and complaining wouldn't change anything.