Sergei Kulakovskii

He is the pilot of Eunova-VIII, 15 years old. Later, when he and Tatyana are defeated by Japan's Republic, Sxano-X, he is a cheerful guy with a good attitude and is hard to hate. He becomes quick friends with the protagonists and worries about them. He seems to have a romantic relationship with Eunova's translator, and his partner, Tatyana, despite her being older.