Muryotaisu Nijimura

Muryotaisu is nearly a mirror of his twin. He is tall and wears his hair in a bun much like Fukashigi's, except that his juts forward. He first turns up in a T-shirt marked with the figure ten raised to the sixty-eighth power, echoing his brother's, and switches to his school uniform for most of the story.

Fiercely devoted to his brother and his friends, Muryotaisu turns violent and aggressive the instant they come to harm. He pushes Joji onward in their effort to stop Kira and shows real compassion for others, working to shield as many people as he can when the gymnasium comes under attack.

He calls his Stand Grand Bleu, and it conjures three dolphins he has named Enzo, Yohana, and Jacques. They soar through the air at tremendous speed, unbothered by the ordinary laws of physics, yet otherwise behave like real dolphins, chirping out little Kiki noises; Jacques in particular enjoys pranking the others, though all three sober up and follow orders the moment Muryotaisu commands them. The Stand began with a single dolphin before growing to three. A sixteen-year-old student at Budagaoka Academy in Morioh, Muryotaisu counts Koji Hirose and Rohan Kishibe among his friends.