Billlie (빌리) #12849591

355

members (measured 7 Oct 2026, 08:56 UTC)

9 November 2021

created (per Roblox API)

10 August 2026

first measured by this register

MusicENK-popBilllieMystic Story

Description

This is Billlie. #NGCorporation Billlie (Hangul: 빌리), is a South Korean girl-group formed by Mystic Story. They debuted on November 10, 2021. The group consists of seven members: MOON SUA, SUHYEON, HARAM, TSUKI, SHEON, SIYOON, and HARUNA. Known for their unique and immersive storytelling concept, Billlie sets themselves apart in the K-pop scene by blending fantasy, mystery, and creative narratives into their music and performances. Established 2021. MYSTIC STORY © All Rights Reserved. neogroup Corporation ©

Written by the group; not a statement by this register.

Membership history

Growth

6 measurements spanning 46 days, net -3. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 354–360 and does not start at zero.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
26 Sept 2026, 03:14	355	-1
21 Sept 2026, 13:32	356	-1
19 Sept 2026, 01:26	357	-1
4 Sept 2026, 19:11	358	-1
19 Aug 2026, 03:52	359	+1
10 Aug 2026, 19:24	358	first reading

Ownership

Owned by neogroup (@NGCorporation) as measured.

Groups seen changing owner — the largest ever handed over and the most recent — are on the ownership transfers board.

Members we’ve seen

neogroup (@NGCorporation) — HOLDER (rank 255)

suminboutu (@Kurouv) — CO-OWNER (rank 253)

sandy (@tigerdonutcats) — ADMIN (rank 252)

aya (@Cookiemila2) — ADMIN (rank 252)

staycgirls (@opal_llx) — ADMIN (rank 252)

Syd (@Not_snowkitty) — ADMIN (rank 252)

jules (@f4sh10nsqu4r3) — HARAM (rank 3)

unicornglitter123 (@MlK4NS) — HARUNA (rank 3)

sxnoos_mintchoco (@Imaniisboss_1) — TSUKI (rank 3)

joyy (@JoyBunnicorn) — TSUKI (rank 3)

MAGGIE (@MAGGOTPANTS) — SIYOON (rank 3)

ilythia (@Alex4vamp) — TSUKI (rank 3)

ria (@xinyivq) — SUHYEON (rank 3)

raisingmyMAYAya (@thunderdab4) — TSUKI (rank 3)

Eunhwiology (@XXxBlackMoonlightxX) — OT7 (rank 3)

nancy (@iiHxxney_Bees) — SUHYEON (rank 3)

Chuu (@unicorncool36) — HARAM (rank 3)

mellie (@jvnhyuk) — HARAM (rank 3)

alii (@skzlogy) — TSUKI (rank 3)

stella (@XAZURELA) — TSUKI (rank 3)

briize (@ArielTsheejBin) — MOON SUA (rank 3)

naeviscat (@seemlykitty716) — TSUKI (rank 3)

beth (@fruitcakeyu8) — TSUKI (rank 3)

sami (@samgabbi1508) — SHEON (rank 3)

Jinri (@Axaxinationdoggy_143) — HARAM (rank 3)

A sample — only members this register has independently measured, highest rank first. Not the full roster.

Rank structure

HOLDER1

OWNER1

CO-OWNER1

ADMIN4

MODERATOR0

--------------0

MOON SUA20

SUHYEON15

HARAM17

TSUKI41

SIYOON17

HARUNA21

SHEON16

OT75

---------------0

Member358

Belllie’ve199

Guest0

Roles and per-rank member counts as Roblox reports them (rank 0 = guest … 255 = owner).

Related groups

Groups whose measured members overlap with this one — a sample from our membership graph.

aespa (에스파)#8164437 · 32 shared members

Kep1er#12680981 · 31 shared members

IVE (아이브)#12765945 · 28 shared members

STAYC#8300341 · 28 shared members

LOONA#3428135 · 27 shared members

NMIXX#12282321 · 25 shared members

fromis9#4648937 · 21 shared members

TWICE (트와이스)#5013880 · 20 shared members

Ah! Love Clothing#9482624 · 19 shared members

RH Studios#10004870 · 18 shared members

IZ*ONE#4406685 · 17 shared members

·VIVIZ·#13679880 · 17 shared members

Open data

Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)

Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.