Luca Nogi (乃木 流架 Nogi Ruka) is Natsume's best friend. He, together with Natsume, has a crush on Mikan Sakura. He has the Animal Pheromone Alice and is a bit embarrassed by it, but Natsume states it's a great Alice since it can help others rather than hurting them. He is nicknamed Ruka-Pyon, because he always seen carrying a rabbit. As a child, Ruka was nicknamed Ru-chan. Ruka is voiced by Miwa Yasuda in the anime.