Kamishiro Rui is an purple octopus merman who lives in the deep sea and is also an alchemist. Rui has bright yellow eyes and purple hair with two blue sides. He is thoughtful and scheming. Rui is a genius, he is good at making potions and mechanical inventions. He looks cold, but he is actually kind. He is ostracized by other mermaids except his friends. He hates vegetables and loves soda candies. He used to be very lonely, so He will be very obsessed with person he loves.