Kamishiro Rui (神代類) is a alchemist who was corrupted. He is friends with the prince of the white lily kingdom Tenma Tsukasa. Rui is an easy-going genius. He's meticulous about making every potion and robot the best it can be, making use of his flair for technology and inventiveness. He even builds robots to use his potions on when alone. His somewhat unique way of thinking often gets him labeled as a weirdo. He hates vegetables.