He’s a male cytotoxic T cell who was once part of Rag’s body. He serves as his personal bodyguard and takes this role very seriously; the safety of the Ragworld inhabitants is his top priority. Personality-wise, Killer T Cell ♂️ is overconfident, somewhat cocky, and easily carried away by his impulses. At times, he may act ruthlessly and even ignore orders, as he was forged in a tough environment that psychologically prepared him to die on the battlefield. Given his overprotective nature, he’s always watching out and willing to risk his life for the people around him without a second thought. He works with Killer T Cell ♀, and they are often seen patrolling the area together. Needless to say, they're often caught in trouble considering their conflictive personalities and differing pattern recognition. Killer T Cell ♂️ acts rather quickly when identifying a menace, and she is there to forbid him from mistakenly harming an innocent soul.