Sango Suzumura is a first-year student at Aozora Middle School. Her civilian look includes light brown eyes and dark purple hair in two low pigtails secured by pink bows, featuring yellow and green clips on the left and fuchsia ribbons on the right. She typically wears a pastel purple blouse with a white lace collar, an indigo ruffled skirt fastened with a yellow waist ribbon, purple sandals, white socks decorated with pink bows, and the purple Heart Kuru Ring on her left middle finger. Her winter outfit consists of a long-sleeved lavender dress under a cropped purple vest, pale yellow socks, and hot pink Mary Janes, with her hair in a side ponytail. For the movie, she dons a light purple floral-patterned sweatshirt, an indigo skirt with pockets, dark red Mary Janes, and ruffled white socks.

Her family runs the "Pretty Holic" beauty parlor, granting her extensive makeup and cosmetics expertise. Sango enjoys collecting cute items and applying makeup, reflecting her strong aesthetic sense. Kind and sociable, she initially lacks self-confidence, often conforming to group opinions to avoid attention, a tendency rooted in childhood experiences like feeling singled out in kindergarten for choosing a purple flower when others picked pink. Her journey focuses on learning to assert her preferences and believe in her worth.

After encountering Laura, a mermaid from Grand Ocean, and witnessing Manatsu (Cure Summer) battle a Yaraneeda, Sango accepts the power to become Cure Coral. Transforming requires the Tropical Pact and Heart Kuru Ring. She activates her powers by applying makeup with a brush, calling out "Lips!", "Eyes!", "Hair!", "Cheeks!", and "Dress!" to achieve her Cure form. As Cure Coral, she announces herself with "Glittering Jewels! Cure Coral!" Her transformed appearance features long light purple hair with ribbons, turquoise heart-shaped flecks in her eyes, pink hearts on her cheeks, and a white sailor hat topped with a coral-shaped shell. Her outfit is a lilac sailor-style dress with a sky-blue cape, fingerless gloves, purple platform heels, and a Tropical Pact pouch on her left hip. Special forms like Excellen-Tropical Style and Snow Crystal Tropical Style showcase longer hair, modified hats, layered skirts, and extras such as pearl waistbands or rainbow wings.

Cure Coral functions as the team's defensive specialist, creating X-shaped shields by crossing her index fingers. Her attacks include "Mokomoko Coral Diffusion" using the Heart Rouge Rod and the group technique "Mix Tropical" with other Cures, emphasizing her role in protecting allies and countering enemy attacks.

Key relationships include her friendship with self-assured Manatsu, whom she admires, and Laura, whom she initially doubts but later defends against classmates mocking mermaids. Her development features several arcs:
- Facing stage fright during a modeling opportunity for the Aozora Pretty Collection fashion show, she gains confidence by focusing on sharing "cuteness" with others.
- Assisting competitors during an actress audition leads her to withdraw, realizing her true passion is empowering others through makeup, not pursuing fame.
- In the epilogue, she trains under her mother as a makeup artist and reunites with Laura after temporarily losing memories of her due to a mermaid artifact.

Trivia notes list her birthday as May 9th (Taurus), a fear of bugs, and her role as an audience surrogate due to her relatable personality. Alternate outfits appear in media, such as the Snow Crystal Tropical Style in the movie *The Snow Princess and the Miraculous Ring!*.