"People call me the Ice Ruler You want me to join you? Interesting. This should be fun."
"Can I grow even stronger? Is that your answer?"
"I don't need any allies. I'm fine as long as there are enemies to slay."
A knight from the ruined Sama Kingdom. He was the commander of a Sama Kingdom Cavalry commando unit, but left to face the gods alone when the war began. Some admired him and tried to join, but Sergio refused them. He was always aloof even while being admired by people for his battles with the gods. At some point, he earned the title Ice Ruler.