Leon Elliott is a young boy with short bright blue hair and large purple eyes. He typically wears a high-collared dark shirt under a red jacket and is often seen riding a blue and orange snowboard, sometimes wearing goggles. Born in a country torn by civil war, Leon lost his parents at age four when soldiers killed them. He was then raised by his older sister, but she also died when she became trapped in a gunfight. Orphaned and alone, Leon joined a group of other children living on the streets, including a boy named Tim Vertical. He developed a deep distrust of adults, feeling ignored and abused by society. Motivated by a desire to protect his friends, Leon sought power and learned to harness Tao, granting him the ability to control air and wind. He refers to this power as Wind, and he can create strong gusts, sharp wind blades, and even tornadoes, and he can suffocate people by manipulating the air around them. After gaining this ability, Leon joined the Apostles of the Stars, a group seeking to remake the world, which ironically forced him to leave the friends he originally wanted to protect. He is confident in his abilities, though he sometimes overestimates his own strength, and he genuinely cares for those close to him. In the events of the story, Leon participates in the Apostles attack on the World Conference, where he uses his wind powers to kill several soldiers. Later, he volunteers to retrieve fireworks for Eve, hoping the sound will trigger a reaction that prevents her from merging with Eden. Near the end, he is saved by Train Heartnet when he is on the verge of being overwhelmed by Eden's monsters. Throughout his journey, Leon moves from being a distrustful, power-seeking child to someone who ultimately aids the protagonists, demonstrating a capacity for change and loyalty.