Six Strong: Billlie’s Otakon 2025 Takeover in Washington, DC
by CeCe Cogar
Billlie brought a packed house to its feet at Otakon 2025 in Washington, DC, delivering a high-energy set built for sing-along hooks, tight choreography, and fan interaction. Videos and fan reports from the concert confirm staples like “GingaMingaYo (the strange world),” “EUNOIA,” and “RING ma Bell (what a wonderful world)” made the cut, with the group tailoring moments for an international audience.
Importantly, Billlie is currently promoting as six after the group’s youngest member Haruna began a temporary hiatus on July 25 following a break-in at her residence; the agency announced Billlie would continue activities with the remaining six members for the time being.
Who Is Billlie?
Billlie is a South Korean girl group formed by MYSTIC STORY in 2021. The group consists of six members: Siyoon, Suhyeon, Haruna, Tsuki, Sheon, and Dajeong. Known for their unique blend of musical styles and captivating performances, Billlie has quickly gained a dedicated fanbase both in South Korea and internationally.
Billlie (stylized Bi11lie) debuted under Mystic Story on November 10, 2021 with the EP the Billage of perception: chapter one. Originally six members—Moon Sua, Suhyeon, Haram, Tsuki, Siyoon, and Haruna—the lineup became seven when Sheon (Kim Su-yeon) joined shortly after debut. The group’s identity blends surreal pop with a serialized “Billage” narrative that runs through albums, videos, and teasers.
Billlie's music often explores themes of self-discovery, empowerment, and the complexities of youth. Their debut single "RING ma Bell (what a wonderful world)" showcased their ability to combine catchy melodies with meaningful lyrics, setting the tone for their subsequent releases. The group's discography includes a mix of upbeat tracks and emotional ballads, demonstrating their versatility as artists.
In addition to their musical talents, Billlie is known for their strong stage presence and intricate choreography. Their performances often feature synchronized dance routines that highlight each member's individual strengths while showcasing their unity as a group. This combination of talent and charisma has made Billlie a standout act in the K-pop industry.
What's Next?
As Billlie continues to evolve as artists, fans can expect new music that pushes boundaries and explores fresh concepts. The group has hinted at a more mature sound in their upcoming releases, reflecting their growth and experiences over the past few years.
As of late July, Haruna remains on hiatus, and Billlie are continuing as a six-member unit. After Otakon, the group’s summer schedule has included festival stages in Korea, with Waterbomb and other dates appearing on setlist trackers and fan calendars. Keep an eye on the group’s official channels for updates to schedules and activities.
Meet the Six Members Performing at Otakon
Billlie's members are known for their individual talents and contributions to the group. Here’s a brief introduction to each member:
Siyoon - The charismatic leader of the group, Siyoon is known for her powerful vocals and stage presence. She often takes the lead in performances and is a fan favorite for her energetic personality.
Suhyeon - A talented vocalist with a unique voice, Suhyeon brings emotional depth to Billlie's music. Her ability to convey feelings through her singing has earned her a loyal following. As main vocalist / dancer, she is known from Produce 101 and MIXNINE and for her acting in the hit teen web series A-Teen, Suhyeon anchors Billlie’s melodic lines
Haruna - The youngest member, Haruna, is known for her youthful charm and dance skills. Despite her age, she has quickly become an integral part of the group.
Tsuki - With her captivating visuals and strong dance abilities, Tsuki adds a dynamic element to Billlie's performances. She is also known for her charming personality off-stage.
Sheon - Joining the group after their debut, Sheon has quickly made a name for herself with her impressive rap skills and stage charisma.
Dajeong - Known for her versatility, Dajeong contributes both vocals and dance to the group. Her ability to adapt to different styles makes her a valuable member of Billlie.
Interesting Facts for New Fans
Here are some interesting facts about Billlie that new fans might find intriguing:
Billlie's fandom is known as "Billlie's," and they have a strong online presence, often trending on social media during comebacks.
The group has been praised for their innovative concepts and storytelling through their music videos.
Billlie often incorporates elements of fantasy and surrealism into their performances, creating a unique visual experience.
Each member has a distinct personality that shines through in their individual projects and collaborations.
Billlie is actively involved in writing and composing their music, showcasing their artistic talents beyond performing.
Tsuki’s viral moment changed the trajectory: The “GingaMingaYo” fancam became a cultural snapshot of 4th-gen performance craft, driving discoverability on social platforms well beyond the fandom.
Resilience as a theme: After health-related pauses, Moon Sua and Suhyeon returned to the stage in 2024; the group rebounded with a new EP and a first world tour.
The Billlie Sound (and Why Dance Matters)
Across five Korean mini-albums plus Japanese releases, Billlie toggle between dream-pop whimsy, crunchy pop-rock, left-field electro, and city-pop gloss—often within the same record. The punchiest calling card is “RING ma Bell (what a wonderful world),” a hard-edged rock single with overdriven guitars, built for crowd bounce and head-nods. Critics picked up on its strutting guitars and lighter-lifting chorus.
On the other end sits “GingaMingaYo (the strange world),” a quirk-pop earworm whose choreo became a fandom touchstone, thanks largely to Tsuki’s viral fancam—an inflection-point moment that boosted the group’s visibility worldwide.
Billlie’s choreography is a key part of their appeal, with intricate dance routines that complement their music. The group’s performances often feature synchronized movements and unique formations, showcasing their dedication to both music and dance. This emphasis on choreography has helped Billlie stand out in the competitive K-pop landscape.
Choreo-wise, Billlie emphasize sharp handwork, quick facials, and rhythmic contrast—a style that makes even medium-tempo tracks feel athletic live. That precision read especially well on the Otakon stage, where fancams show crisp transitions and synchronized drops in “Mcguffins ~ who’s the Joker?” and “GingaMingaYo.”
As Billlie continues to grow and evolve, they remain committed to delivering high-quality music and performances that resonate with fans around the world. Their participation in events like Otakon 2025 highlights their global reach and the increasing popularity of K-pop beyond South Korea.
