Diluc is a tall guy, who has red longish hair, and red eyes. He was a bit serious at times, and hates being teased.. more so by his best friend. He's serious about his college studies but sometimes he gets exhausted by it. He also has a brother named Kaeya, who was a popular jock, and had blue hair, about the same length, and a toned body. Both Diluc and Kaeya are very different brothers..