Sui

Sui is a South Korean singer and dancer, best known as a member of the K-pop girl group KiiiKiii under Starship Entertainment. Born Lee Su-bin, she debuted with the group in February 2025 and has quickly gained attention for her clear, high-pitched vocals and bright stage presence. As a rookie idol, she is part of a generation that builds on the massive success of senior group IVE, carrying forward Starship's legacy of producing charismatic female performers. Fans know her for her youthful energy and the warmth she brings to group interactions, both on and off stage.[edit]

Sui grew up in Seoul, South Korea, and from an early age showed a strong interest in music and dance. She attended Seoul Performing Arts High School, a prestigious institution known for training many K-pop idols, where she honed her performance skills. Before joining Starship Entertainment, Sui trained as a trainee at SM Entertainment, one of the Big 3 agencies. That experience gave her rigorous vocal and dance training, but she eventually moved to Starship, a decision that would lead to her debut with KiiiKiii. Her training period under Starship lasted several years, during which she refined her stage presence and built the stamina needed for the competitive K-pop industry.[edit]

Sui's career breakthrough came on February 16, 2025, when KiiiKiii officially debuted with the single album I DO ME, featuring the title track of the same name and the B-side BTG. The debut was highly anticipated as KiiiKiii is the sister group to IVE, and it sold over 200,000 copies in its first week, a strong start for a rookie group. Sui contributed lead vocal parts to both tracks, showcasing her stable tone and emotional delivery. The group's first comeback followed on August 11, 2025, with the single album DEBUT SONG, which included the title track DEBUT SONG and the B-side CROWD. This release solidified their presence in the competitive K-pop market. Sui continues to promote actively with the group, appearing on music shows, variety programs, and fan events, building her reputation as a reliable vocalist and engaging performer.[edit]

Sui is portrayed as youthful, energetic, and cute, with a fresh-faced, natural makeup look and casual, trendy fashion. Her style aligns with KiiiKiii's overall "girl next door" concept. Media coverage focuses on her potential as a talented vocalist and charismatic performer. She engages with fans through group social media accounts on Instagram, YouTube, and TikTok, where her posts are bright, affectionate, and fan-focused. KiiiKiii's official fandom name has not been announced as of early 2026, but fans organize streaming parties and voting campaigns to support the group's music show wins.[edit]

Sui holds no placement in the iFANN Global Top 1,000 or any scope-specific rankings as of August 2026. While her vocal capabilities and stage presence have garnered attention within the K-pop sphere, the iFANN evaluation engine has not assigned her a numerical rank among global public figures at this time. Her standing remains defined by active group performance rather than individual chart positioning in the broader celebrity landscape. The fanbase for KiiiKiii, including supporters of Sui, operates without a formally announced name, distinguishing them from groups with established monikers like Blink or ARMY. This unbranded community engages deeply with the group's Y2K-inspired mythology and the concept of being "delulu," a term central to their January 2026 release, *Delulu Pack*. Interaction is driven by immersive content such as the "WhyKiiiKiii Tour" digital experience, where Sui guides audiences through weather-themed narratives. Fans participate in narrative-driven engagement via collaborations like the web novel *Dear.X*, which features the single "To Me From Me." There are no documented records of large-scale, fan-funded projects specifically named after Sui, such as birthday billboards or subway advertisements, reflecting the nascent stage of their collective organization. The audience identity is rooted in the shared appreciation of the group's playful experimentation and rejection of fixed labels rather than traditional idol-fandom rituals.[edit]

Before joining Starship Entertainment, Sui trained at SM Entertainment for approximately three to four years, a notable transition between a major Big 3 agency and a mid-tier company. Her stage name is deliberately short and memorable, aligning with KiiiKiii's strategy of utilizing unique, catchy identifiers. Colleagues and viewers frequently label her the "mood maker" of the group due to her consistently cheerful demeanor during variety content. She occasionally incorporates English phrases into her interactions with international fans during livestreams. A defining moment in the group's early lore occurred in November 2025, known as the "Udon Noodle Head" incident. During a live broadcast, member Haum made a disparaging remark about Sui's head, sparking immediate backlash regarding rude behavior toward a bandmate. This event remains a focal point in discussions about the group's internal dynamics and Sui's resilience. The group further cemented its cultural legacy with the *Delulu Pack* EP in January 2026, solidifying a shift toward a mature, confident sound that resonated with publications like *Teen Vogue*.[edit]

Details about Sui's parents and siblings are not publicly disclosed. She has mentioned in interviews that she has a close relationship with her family, but specific names and occupations remain private. She lives in Seoul, likely in dormitory arrangements with her KiiiKiii groupmates, as is common for rookie K-pop groups. No pets have been publicly mentioned.[edit]

Sui is a member of KiiiKiii, a six-member girl group under Starship Entertainment. The other members include Leeseo, Yujin, Jiyoon, Siyoon, and Haena. Her agency seniors include IVE, MONSTA X, and K.Will. She has no solo collaborations confirmed as of early 2026.[edit]

Sui has no public romantic relationships as of 2026. As a rookie idol who debuted in 2025, she is subject to Starship Entertainment's typical dating bans for newer artists. No confirmed dating rumors, engagements, marriages, or divorces exist. She is currently focused on her career with KiiiKiii and remains single.[edit]

iFANN currently estimates Sui's individual net worth at $100,000 as of 2026. This figure represents her share of KiiiKiii's earnings generated from music sales, digital streams, concert tours, fan meetings, and variety show appearances. Rookie idols from mid-tier agencies typically earn between $50,000 and $200,000 annually before taxes, placing Sui's income at the lower end given her brief career span since debuting in 2025. No solo endorsement deals have been reported for the singer. The calculation accounts for the group's strong debut album sales exceeding 200,000 copies and their ongoing promotional activities.[edit]