TV-Series
Description
Aine Yūki attends Star Harmony Academy, transferring from the normal division to the idol division. She embodies the cute-type idol aesthetic with her signature brand Sugar Melody. Her distinct look includes long, curled bubblegum pink hair shifting to peach ombre at the tips, straight bangs, and vibrant red-orange eyes flecked with gold. A sky blue bow adorns her hair, evolving from a headband to a side bow in season two as her curls lengthened. She stands 155 cm tall.

Aine’s defining charm lies in her extraordinary gift for friendship, championed by her rallying cry, "I'll make a million friends!" This extends to animals, particularly penguins. Radiating positivity and kindness, she instinctively supports others, declaring, "If a friend is in trouble, I will never refuse to help." Initially focused on friendship quantity, she matures to cherish depth, affirming, "Each and every friend... Every one of them is my precious friend."

Her journey began as an ordinary student working at her family’s Penguin Café. A pivotal shift occurred when delivering her favorite tomato basil cheese sandwich to idol student Mio Minato. After Mio visited the café to settle payment and joined Aine playing with children, she proposed forming the Friends unit Pure Palette. This led Aine into Aikatsu activities, her academy transfer, and their shared goal: becoming top Diamond Friends.

Career highlights include an unconventional duet debut with Mio using Rare coord instead of a solo Normal Coord performance. Her influence inspired designer Chiharu Hachiya to create Sugar Melody, where Aine became the muse. She evolved from relying on Mio to embracing rivalry, exclaiming, "I should've been trying to overtake Mio from the very start!" Pure Palette ultimately achieved Diamond Friends status. In *Aikatsu on Parade!*, she interacts with idols across series, bonding with a cat-eared character through her animal affinity.

Key bonds feature Mio Minato, whom Aine calls "my one and only," emphasizing their unique connection beyond her million-friends dream. Her family operates Penguin Café; she is the middle child of siblings Kazune (elder brother), Suzune (elder sister), Momone (younger sister), and Yoshitsune (younger brother), alongside parents Masamune and Nene. She collaborates with Chiharu Hachiya and shares camaraderie with Love Me Tear’s Karen and Mirai.

Her name carries layered meaning: Yūki (友希) blends "friend" (友) and "hope" (希), while Aine (あいね) uses the characters 愛音 for "love" and "sound."

Notable trivia marks her birthday on July 20, aligning with Japan’s Marine Day and a historical World Friendship Day proposal—echoing the moment jumping into water with Mio fortified her courage. She dislikes crying, excels in music and small talk, and holds franchise distinctions: first protagonist debuting in a duet, first without floral aura motifs, and first with a surname devoid of sky-related meanings.