After Alister killed Delia, his "60 seconds of power" hasn't run out yet. So, he glared at Takahashi Ken and Nikui Noroi and was about to kill them.
Seeing through Alister's intention, Brandyn yelled, "Chaos Hero, wait!"
Despite Brandyn's yelling, Alister didn't stop and he used the mana pressure of his chaos mana to kill Takahashi Ken and Nikui Noroi. His chaos mana not only destroyed their body, but it also wiped out their soul from existence.
"Sir Brandyn, leaving those two trashes alive will only harm us heroes and even the world. With how those two colluded with a demon general, they can no longer be trusted."
Hearing Alister's explanation, the rest of the heroes agreed.
As heroes, they were tasked to defeat the Demon King so the rest of the heroes weren't naive enough to forgive Takahashi Ken and Nikui Noroi who betrayed humanity and colluded with a demon general.
