Movie
Description
Sumire Hikami studies at Starlight School, specializing as a cool-type idol affiliated primarily with the brand LoLi GoThiC. Her appearance features long periwinkle hair styled in a hime cut, reaching midway down her back, and eyes that fade from blue-violet to vivid violet. An indigo bow typically adorns her hair above the right ear, complementing her notably pale skin. She maintains a calm, kind, soft-spoken, and polite demeanor. Initially preferring solitude, her outlook shifted after becoming roommates with Akari Ōzora. A strong interest in fortune-telling sees her frequently carry tarot cards, while her thoughtfulness manifests in gestures like brewing apricot tea tailored to others' needs. Though widely admired for her beauty and natural cuteness, Sumire actively works to avoid relying solely on these traits.

She enrolled at Starlight Academy following a suggestion from her older sister, Azusa Hikami, who recognized her idol potential and hoped it would foster friendships. Entering the school, Sumire initially regarded everyone as rivals, believing the idol world operated on a principle where one's success meant another's failure, leading her to practice independently. Her early experiences included meeting Akari Ōzora, who became her roommate after a dormitory reassignment. Sumire found Akari puzzling, especially when Akari invited her to an audition Sumire desired to win, only to learn Akari simply enjoyed shared idol activities. Despite differing personalities, they forged a close bond. Sumire also formed a friendship with classmate Hinaki Shinjō, their interactions starting formally before deepening.

A significant development occurred when Sumire won an audition to serve as temporary manager for top idol Ichigo Hoshimiya. This role made her acutely aware of the vast gap in their abilities. Ichigo observed similarities between Sumire's current self and her own early idol days, particularly in striving toward an unreachable senior. As a gesture of gratitude, Ichigo allowed Sumire to perform at her concert and gifted her the Odile Swan Coord. Sumire deeply admires Yurika Tōdō, her senior in LoLi GoThiC, aspiring to match Yurika's brand dedication—a sentiment reflected in the poster of Yurika displayed in Sumire's room. Yurika respects Sumire's passion and endorsed her wearing the brand's latest Premium Rare coord.

Sumire later partnered with Rin Kurosawa to form the unit Dancing Diva, proposing their collaboration with the declaration, "I will make you shine, and in exchange, I want you to make me shine as well." Their relationship resembles siblings, with Rin specializing in dance and Sumire in singing. They mutually support each other, offering advice to improve their respective weaker areas—dancing for Sumire and singing for Rin. Alongside Akari and Hinaki, Sumire became a member of the unit Luminas. She also took on the role of mentor to Madoka Amahane.

Her journey included overcoming ichthyophobia—a fear of dead fish stemming from discomfort with their "soulless eyes"—which she bravely overcame. She is also the only idol known to have failed a Special Appeal during a performance. Nicknamed the "Blooming Ice Flower of the Stage" for her elegant singing style, her favorite foods are black tea and scones. Her birthday is October 20, making her zodiac sign Libra. Her surname "Hikami" combines "ice" and "top," signifying "on ice," while her given name "Sumire" means "violet flower," reflecting her nickname.