|Real Name||Zain Sai|
Zero is an Aisumasutā assassin, and one of the heroes in the series. His older brother was killed in a war, and Zero was given the taing his brother was initially given. After 9 years, Zero was ready to fight in the war that left him an only child, but the war was over, with the opposing army leaving victorious. His rage slowly cooled off in the remaining years, and he entered the Combat Competition as a substitution to the war.
- Lethal Combat: "Zero is an Aisumasutā warrior, and the heir to the throne of Southern Porū. He joined the Combat to show his brute strength, and as a substitute to the war that left him a single child. He uses ice as his main weapon, but isn't afraid to whip out the ol' katana."
- Lethal Combat: "After Succesfully killing Daitai, Zero realized his full potential. And after seeing the mark on Daitai's uniform, he knew why his hatred towards him was so strong. Daitai was the leader of the Singoh Alliance; the opposing army in the war that killed his brother. Zero was satisfied with his work, but still had a hole inside of him that could only be filled by his brother."