Akira Kenjō is a second-year transfer student at Ichigo Field High School, moving to be near the hospital where her younger sister Miku receives treatment for a serious illness. She presents a boyish appearance with short dark red hair, sharp brown eyes, and practical clothing such as layered shirts, blue jeans, a brown belt, tan boots, and a dog tag necklace. Her tall stature and gentle, protective demeanor often lead to initial misgendering, though she remains unbothered. Her personality centers on unwavering loyalty and a strong sense of justice, described as dog-like due to her instinct to protect others. She frequently comforts people with the phrases "Are you okay?" and "There, there." Rational and reliable, she navigates unfamiliar situations competently. Her devotion focuses intensely on Miku, whom she regularly visits in the hospital, bringing chocolate to uplift her spirits. This bond drives critical events, such as when Miku's stolen Kirakiraru triggers Akira's furious determination to rescue her.

Akira transforms into Cure Chocolat, the Pretty Cure of strength and love, using the Sweets Pact and an Animal Sweet modeled after a dog and chocolate. In this form, her hair brightens to vibrant red with spiky bangs featuring a dark brown streak, and she gains canine traits including pointed ears and a fluffy tail. Her outfit includes a chocolate-themed brown top hat, a red-and-brown striped jacket with a cream fur collar, a short brown cape, dark red shorts under a cream pleated skirt, thigh-high white socks, and crimson boots with cream paw-like toes. She also wears a dark brown choker resembling a dog collar with a silver tag. Cure Chocolat leverages her enhanced canine sense of smell for tracking. In battle, she wields chocolate-based weapons and performs attacks such as creating shields or energy streams, as well as group techniques like "Animal Go Round!" and "Fantastic Animale." Her transformation phrase is "Cure La Mode・Decoration!," and she introduces herself with: "With Strength and Love! Let's・La・Mix It All Up! Cure Chocolat! Is Ready To Serve!"

Her origin as a Cure occurs after witnessing Cure Whip struggle against a thief who steals chocolates intended for Miku; a surge of protective desire activates her Sweets Pact. Key arcs focus on her relationship with Miku, including a battle to reclaim Miku's stolen Kirakiraru and a confrontation where the antagonist Elisio exploits this bond, accusing Akira of prioritizing strangers over family. She rejects his nihilism, declaring she will protect everyone without sacrifice. Her interactions with teammates shape her growth: she mentors Ichika Usami, easing her nervousness, and her dynamic with Yukari Kotozume evolves from ideological clashes into mutual respect and deep friendship. In the film Kirakira☆Pretty Cure A La Mode: Crispy! The Mille-feuille of Memories!, she travels to Paris with the team for a patisserie competition and supports Yukari’s suggestion to give a distressed teammate space. When an antagonist temporarily turns her into an animal opposing her dog motif, she adapts alongside her teammates to confront the threat.

In the series epilogue, Akira pursues medical studies, continuing her dedication to caring for others; her grown hair is tied in a ponytail, signaling maturity while retaining her core traits of loyalty and protectiveness. Her name carries thematic significance: "Kenjou" combines the characters for sword or dog and castle, while "Akira" means bright or clear, sometimes interpreted as "never give up."