Toko Aoi, identified as Tokonatsu Aoi in Japanese media, is Valt Aoi's younger brother and Nika Aoi's twin sibling, sharing their August 7 birthday. Their parents are Chiharu Aoi and Kento Aoi. Initially depicted as a young child, Toko sports light-blue hair, green eyes, and a distinctive fang. His early attire includes an orange cap bearing a Beyblade symbol, a bright green shirt, dark blue shorts, and teal sneakers. By Beyblade Burst Turbo, approximately two years later, Toko ages to around 10 years old and loses his prominent fang. His updated wardrobe features a yellow hoodie with an orange "T" emblem, dark blue pants, boots, and a blue cap retaining the Beyblade symbol. Energetic and cheerful, Toko mirrors his twin sister Nika's demeanor. He consistently supports the Beigoma Academy BeyClub, cheering alongside Nika during matches. Demonstrating analytical tendencies, he uses a tablet to study Beyblade mechanics and battle strategies, reflecting his deep interest in the sport. He occasionally offers tactical advice to Valt during tournaments. Toko and Nika remain inseparable, sharing opinions and activities like supporting Valt, attending school, or assisting their mother at the family bakery, Aoi Pan. In early seasons, Toko wields Raging Roktavor Force Jaggy in the anime and Dark Doomscizor Force Jaggy in the Beyblade Burst Evolution manga. His Beyblade evolves to Spiral Treptune 8Bump Wedge in Turbo, utilizing the Spiral Counter special move—a technique employing rubber components to absorb an opponent's spin speed and convert it into offensive power. Toko participates in multiple battles, defeating Akio and securing an unseen victory against Nika, while losing to Nika and Suoh Genji. During Turbo, he triumphs over Aiger Akabane in a one-on-one match and wins a Battle Royale. Toko's role expands significantly in Turbo when he becomes leader of the Beigoma Academy BeyClub following Fubuki Sumiye's departure, paralleling Valt's founding role. He competes in the Luinor Cup, advancing to the semi-finals before losing to Suoh Genji. His development includes refining his launch technique to resemble Valt's distinctive style. The name "Tokonatsu" translates to "everlasting summer," aligning thematically with his twin's summer-related name and reflecting his persistent cheerfulness. Toko holds the distinction of being the only Aoi family member with an altered name in the anime's international release.