Yayoi Kise, known as Lily in the English adaptation, is a second-year student at Nanairogaoka Middle School. Named Yayoi for the first month of spring to embody kindness and gentleness like her mother, she lost her father when young. Initially a shy crybaby who avoided others, she privately nurtured a passion for drawing and a dream of becoming a manga artist, hiding her artwork out of modesty. Her life shifted dramatically upon meeting classmates Miyuki Hoshizora and Akane Hino. Recognizing her artistic talent, they encouraged her to enter a school poster competition. Though she didn't win and faced teasing, this experience sparked her growth. When Miyuki and Akane were later endangered during a conflict, Yayoi intervened to protect them, triggering her transformation into Cure Peace, the yellow-themed warrior commanding lightning and thunder. As Cure Peace, her appearance changes significantly: her shoulder-length blonde hair brightens, extending into a high, fanned ponytail secured by a winged tiara. Her costume features yellow and gold accents with lightning motifs, including puffed sleeves, feathered layers, and ribbon-adorned boots. Her unique transformation sequence incorporates varying "rock-paper-scissors" gestures each episode, aligning with her peace theme (the scissors gesture doubles as a peace sign). She introduces herself with "Sparkling, glittering, rock-paper-scissors! Cure Peace!", while her Glitter Force counterpart declares, "Puppies and kittens, the power of love! I'm Glitter Peace!". Initially, her timid nature carried into battles; she fled early confrontations and accidentally activated powers through tears. She gradually embraced her role, developing resilience and leadership. Key moments cementing her courage include overcoming self-doubt during a relay race where she tripped but received team support, and confronting the villain Akaoni after a misguided April Fool's prank caused temporary distrust among friends. Her primary attack, Peace Thunder (renamed Sparkle Lightning in Glitter Force), channels lightning through peace signs to strike foes. She later mastered upgraded techniques like Peace Thunder Hurricane and combination attacks such as Thunder Blizzard with Cure Beauty. Team upgrades like Tiara Mode and Princess Mode, granted by the Princess Candle, bestowed elaborate crown-like tiaras, halo accessories, and amplified electrical powers. These forms enabled group finishers like Rainbow Healing and Rainbow Burst. Her relationships define her development. She bonds deeply with Miyuki, empathizing with her as a newcomer, and maintains a playful dynamic with Akane despite frequent teasing. She admires Reika Aoki, who appreciates her artwork, and cherishes memories of her father, whose encouragement shaped her compassionate outlook. By the series' conclusion, she evolves from a withdrawn artist into a determined hero, balancing creative pursuits with superhero duties. Her journey underscores themes of loyalty and inner strength, exemplified in story arcs like the rescue of Candy from the Bad End Kingdom, where the team's unity against Emperor Pierrot showcased her unwavering resolve.