Ruka Nogi is an elementary student with the Animal Pheromone alice and is best friends with Natsume Hyuuga.
Ruka is Natsume Hyuuga's best friend and he likes Sakura Mikan. He's very care about Natsume and Mikan, and animal. When he's with animal, his personality changed, that's why he hides it.
Ruka possesses the Animal Pheromone alice that allows him to influence the emotions and actions of animals through the use of pheromones. He is also able to understand animal communication.