TV-Series
Description
Yu Tendo is a recurring character in the Metal Saga, first appearing as a young and exceptionally gifted Blader. Physically, he is a small boy with light skin, large, expressive dark green eyes, and fluffy orange or yellow-orange hair that bangs over his forehead. His typical outfit consists of a white jacket with blue highlights, white shorts, and white, boot-like shoes with blue accents.

Yu possesses a generally happy-go-lucky and cheerful personality, showing a genuine and enthusiastic love for Beyblading. Despite his young age, he is an intelligent and astute observer with strong convictions. He has a tendency to idolize powerful Bladers who defeat him and dislikes being patronized or treated as a little boy, a reaction Tsubasa Otori sometimes provokes for fun. Like many children, he can be prone to whining, loves treats like ice cream and pizza, and enjoys playing with toys. A notable quirk is his habit of giving playful nicknames to almost everyone, such as calling Kyoya "Yo-Yo", Gingka "Gingky", Kenta "Kenchi", and Masamune "Mr. Butt-in-Ski". Over time, Yu shows signs of maturing; while still acting childishly in the second season, he becomes more responsible in the third, accepting when he cannot battle and acting as a voice of reason for younger characters like Tithi.

Yu's background reveals he was originally recruited by the Dark Nebula organization, who promised him the chance to battle strong opponents. He was taken in after being defeated by Ryuga, whom he came to idolize as the first person to beat him. However, he separates from the Dark Nebula after they betray him and attempt to destroy his Beyblade, Flame Libra. This event leads him to befriend the protagonist, Gingka Hagane.

Within the story, Yu plays a significant role as a formidable opponent and later an ally. He wins the Survival Battle tournament and, as his prize, creates the Battle Bladers tournament. He serves as Gingka's first opponent in that tournament. After leaving the Dark Nebula and befriending Gingka's group, Yu becomes the substitute member of the Japanese representative team, Gan Gan Galaxy, during the World Beyblade Championships, where his tag-team partner is often Tsubasa Otori. His key relationships include a close friendship with Gingka, a competitive partnership with Tsubasa, and a deep, if complicated, admiration for the powerful Ryuga.

Yu's development sees him transition from a member of a villainous organization to a valued hero. Initially, he joined the Dark Nebula seeking strong opponents, but after experiencing their cruelty, he chooses friendship and fair competition. His skills continue to grow as he participates in the world championships, and he eventually helps in the final battle against the god of destruction, Nemesis, by sharing his power.

His notable abilities stem from his Beyblade, Flame Libra T125ES, a Stamina-type Beyblade renowned for its incredible endurance and ability to spin for very long periods. Yu is a genius Blader whose primary motivation is simply to have fun battling with his special Beyblade. Libra's most unique power is its capacity to generate powerful sonic vibrations, which Yu uses for various special moves. These include the Sonic Wave, a shockwave that disrupts an opponent's balance; the Sonic Shield, a defensive barrier of vibrations; the Sonic Buster, which turns the ground to sand to trap opponents; and his most powerful technique, the Inferno Blast, which creates a massive geyser of sonic energy that draws in opposing Beyblades and drains their stamina.