Thirteen had accompanied his hosts to countless battlefields.
After everything he had been through and the unfairness that his hosts had been subjected to, Thirteen's killing intent gradually built up and became something that not just anyone could face head-on.
That killing intent had first flared up when Cranky had died, allowing him to wield Ruyi Jingu Bang and harness its might to pummel the Majin King to oblivion.
Siri, who had never been exposed to such powerful killing intent, couldn't help but look at the teenage boy in fear.
For a brief moment, Siri saw a scene where Zion Leventis stood on a mountain of corpses, looking down on her with those green glowing eyes that didn't seem to belong to a human being.
Perhaps, reaching her limit, her eyes rolled out of her socket before collapsing unconscious on the ground.
After seeing that the stubborn girl had finally fainted, Thirteen closed his eyes to disperse his killing intent.