TV-Series
Description
Multi Nanairo, also known as Multi Nana-iro, stands as a central figure in the series. Initially a solo competitor with immense influence, boasting over 10 million followers under the team name "Rainbow" in the Pro League, she later joins Team Persona. Her driving ambition to reach the pinnacle of competitive play, The X, and defeat her older sister, Sigrid Nana-iro, fuels her journey, stemming from a childhood marked by 10,000 losses against Sigrid in their battles.

Her appearance features black eyes and black hair accented by vibrant rainbow streaks. Multi showcases a remarkable talent for rapid outfit changes, adapting her look to suit different battle personas. Casual wear includes a gray headband with horn accents, a rainbow-striped black shirt, gray shorts, brown-gray leggings, and black sneakers with gray soles. For Wizard-type Beyblade battles, she adopts a "cute" idol style: headphones, a white top with a black ascot, a black corset featuring a white bow, a ruffled knee-length skirt, sheer tights, and buckled boots. When deploying Knight-type Beyblades, she shifts to a "cool" magician aesthetic with a top hat, cape, gloves, and asymmetrically striped dress shoes. Additional attire includes a Bey Crafter uniform (red glasses, blue shirt, black tie, lab coat, black pants) and a sushi restaurant uniform with a rainbow-patterned collar for part-time work.

Multi exhibits adaptability and tenacity, leveraging sharp analytical skills to study opponents and devise counter-strategies. She occasionally employs sarcastic wit, particularly when offering tactical insights to teammates. Her "cute" persona is accompanied by the catchphrase "M'kay!", while declarations like "It's time to switch up my Bey!" signal strategic shifts mid-battle.

Her Beyblade arsenal primarily alternates between Stamina-type Wizards and Defense-type Knights. Key primary Beys include Arrow Wizard 4-80B, Helm Knight 3-80N, Lance Knight 4-80HN, Wand Wizard 5-70DB, Mail Knight 3-85BS, and Arc Wizard R 4-55LO. She also crafts Scythe Incendio 4-60T, intended as a gift for Sigrid but later given to Robin Kazami. Her repertoire includes generic or borrowed Beys like Claw Leon 5-60T (her first Bey), Keel Shark 3-60LF, Tail Viper 5-80S, and others acquired during training or events. Her techniques include Raining Lance (overhead force smash), Xtreme Dash variants like Helm Impact and Mirror Reflection (counterattacks using opponent momentum), Sylphide Breath (stamina-based stabilization), Xtra Shoot Very Heavy Mail (impact absorption and parry), and Xtra Shoot Spin Tornado Cyclone (centrifugal force cyclone).

Her competitive record across anime and manga spans numerous victories and defeats. Significant anime wins include battles against Robin Kazami (Episodes 2, 3, 9, 20), Meiko Myoden (Episode 4), and Yuni Naniwa (Episode 23), alongside losses to Sigrid (Episodes 34, 48) and Rex Jura (Episode 37). Season 2 highlights feature a victory over Sigrid (Episode 82) and a tag-team win with Zonamos Nekoyama against Jian Strong (Episode 58). Manga battles mirror several results, including wins against Robin (Chapter 2) and losses to Sigrid (Chapters 9, 13–14). This trajectory charts her progression from an isolated contender to a resilient team member, culminating in hard-fought triumphs over her sister despite earlier setbacks.

Key relationships define her journey: Sigrid remains her primary rival and emotional anchor, their dynamic evolving through repeated confrontations. As teammates, Robin Kazami and Jaxon Cross receive her strategic support, notably emphasized during the Shuffle Battle Fest showcasing Team Persona's solidarity. Professional connections include Megaoka, a former instructor at Private Bey Academy, and Tenka Shiroboshi, a fellow Blader.

Her narrative arc extends beyond the stadium, confronting crises of confidence in her abilities as a Beycrafter following revelations that shake the Blading world. Executive producer commentary points to future developments tied to her "Rainbow Blader" epithet and "seven-colored" namesake, fueling fan speculation about potential mastery of seven Beys corresponding to rainbow hues.