Sae Itoshi and Rin Itoshi

Rin Itoshi: is a cold, calculating, and extremely focused person. He is serious, competitive, and a perfectionist, with a strong determination to achieve his goals. He usually remains calm under pressure and prefers to work alone, showing little interest in social or emotional relationships.

Sae Itoshi: is a cold, serious, and extremely perfectionistic person. He speaks little, but when he does, he is direct and blunt. He has great confidence in himself and his talent, and he is not interested in wasting time with what he considers mediocre. His attitude is usually distant and elitist, which makes him seem arrogant to others.