Rui Ninomiya is a main character in the anime series 'Kagaku Ninja-tai Gatchaman Crowds.' Rui is known for their intelligence and technical prowess, being the creator of the GALAX social network and the leader of the mysterious group known as the CROWDS. Rui, who often presents with an androgynous appearance, plays a pivotal role in the series by challenging traditional notions of heroism and leading critical developments that influence the narrative and the fate of society.