Kelsey, also known as her superhero identity Glitter Sunny, serves as a central character. She possesses dark red eyes and short red hair typically styled in a ponytail secured with clips, featuring messy bangs. Her casual wardrobe includes a loose orange long-sleeve top with yellow stripes layered over a dark red tank top, paired with blue pants and dark red flats. In warmer conditions, she opts for a light orange tank top over an orange T-shirt, khaki shorts, white stockings, and tan shoes. Transforming into Glitter Sunny dramatically alters her appearance: her hair becomes bright orange and longer, arranged in a bun with loose strands and a distinctive white wing accessory. She adorns a white tiara centered with an orange gem, matching earrings, and a burnt orange choker. Her costume is a pastel orange dress featuring burnt orange detailing, white feathery sleeves accented by orange spheres, and an orange bow on the chest. She wears burnt orange shorts and tall white boots with orange accents. Variations such as Tiara Mode, Princess Sunny, and Royal Mode introduce further changes, including gold crowns, elongated hair, halos, cream overlays, and wing-like elements. Her personality radiates a tomboyish, competitive, and passionate energy. Kelsey exhibits a bold, confident attitude and frequently acts as the class jokester, using humor to diffuse tension. Despite her playful teasing, especially directed at Lily, she displays profound loyalty to her friends and acts decisively during crises. She openly voices her dislike for overly cute or sentimental things, finding them cringeworthy. Academics are not her strength, but she excels in volleyball, where her fierce determination drives her to rigorous practice following losses. Her family operates an okonomiyaki restaurant, where she occasionally assists, reflecting her Osaka roots and Kansai dialect, which shapes her speech patterns and colloquialisms. Kelsey's background centers on her life as a middle school student and volleyball enthusiast at Rainbow Hills Middle School. She first appears aiding Emily during a nervous classroom introduction, establishing their friendship. This bond strengthens when Emily supports Kelsey during volleyball practice, helping her overcome performance struggles. A pivotal moment occurs when Kelsey witnesses Emily, transformed as Glitter Lucky, battling a Buffoon monster. Inspired by Emily’s refusal to surrender and recalling their shared "sweating, not crying" mantra, Kelsey breaks free from magical despair to defend her friend. This act of bravery summons a Glitter Pact, enabling her transformation into Glitter Sunny. Initially hesitant and embarrassed by the transformation, she gradually embraces her role, utilizing her fire-based powers and super strength—demonstrated by feats like lifting and slamming Buffoons or creating earthquakes with punches. As Glitter Sunny, she commands fire and flames, executing attacks like Sparkle Fire, charging her Glitter Pact to form a fireball struck like a volleyball spike. Upgrades include Sparkle Fire Inferno and Sparkle Fire Shot, a combination attack with Glitter Spring. She also participates in group attacks such as Tiara Mode Torrent, Rainbow Burst, and Royal Rainbow Burst, requiring coordinated transformations and specialized items like Princess Wands or the Royal Clock. Her relationships form the bedrock of her character. She shares a close, protective bond with Emily, whom she describes as a scatterbrain but values as a true friend. She frequently teases Lily yet acknowledges her artistic talent. With April, she maintains a friendly rivalry rooted in mutual athletic respect, often competing while also offering support. She admires Chloe for her academic and leadership skills. Outside the Glitter Force, she interacts with her volleyball teammates, cheering them on when not playing. Kelsey’s growth across official media shows her evolving from a hesitant recruit to a committed warrior. Early episodes highlight her initial reluctance to join the Glitter Force, prioritizing volleyball, but she gradually balances this duty with her passion. Moments like overcoming her fear of heights during missions and participating in global adventures—such as a magical trip to the Amazon—underscore her adaptability. Her journey emphasizes themes of loyalty, courage, and the interplay between personal passions and collective responsibility.