Emotions are like handcuffs for Koji, always keeping him restrained or like anchors weighing him down, he was simply always calm. He was in charge of his emotions, they were not in charge of him. He never let the love for someone overwhelm him. He realized that he should stop caring for everyone, reducing your empathy can get you far in life. He also distances himself from people who bring negativity. He simply keeps his feelings and viewpoints to himself.