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Sebelum bergabung dengan grup, Kazuha adalah seorang balerina profesional, dan selama itu dia dibina di Belanda.
=== Debut dengan Fearless dan Kepergian Garam ===
Pada 14 Maret 2022, Source Music mengumumkan bahwa mereka akan meluncurkan grup idola wanita baru bekerja sama dengan Hybe Corporation, dengan Sakura dan Kim Chae-won ditetapkan sebagai anggota pertama grup tersebut.<ref>{{cite news|date=14 Maret, 2021|title=미야와키 사쿠라·김채원 하이브 합류 "쏘스뮤직 걸그룹 데뷔|language=ko|trans-title=Miyawaki Sakura dan Kim Chae-won bergabung dengan Hybe "Debut girl grup Source Music"|work=Star News|url=https://entertain.naver.com/read?oid=108&aid=0003035384|url-status=live|access-date=27 Maret, 2022|archive-url=https://web.archive.org/web/20220321012808/https://entertain.naver.com/read?oid=108&aid=0003035384|archive-date=21 Maret, 2022}}</ref><ref>{{Cite web|last=Yang|first=Haley|date=14 Maret, 2022|title=Ex-IZ*ONE members Miyawaki Sakura, Kim Chaewon sign with Source Music|url=https://koreajoongangdaily.joins.com/2022/03/14/entertainment/kpop/Miyawaki-Sakura-Kim-Chaewon-IZONE/20220314115220400.html|access-date=28 Maret, 2022|website=Korea JoongAng Daily|archive-date=March 26, 2022|archive-url=https://web.archive.org/web/20220326220403/https://koreajoongangdaily.joins.com/2022/03/14/entertainment/kpop/Miyawaki-Sakura-Kim-Chaewon-IZONE/20220314115220400.html|url-status=live}}</ref> Pada 21 Maret, Hybe mengonfirmasi bahwa grup tersebut akan resmi debut pada bulan Mei.<ref>{{Cite web |last=Jeong |first=Ji-won |date=21 Maret, 2022 |title= |script-title=ko:하이브 측 "사쿠라·김채원 걸그룹, 5월 데뷔 목표"(공식) |trans-title=Sisi hybe "Girl group Sakura dan Kim Chae-won bertujuan untuk debut pada bulan Mei" (resmi) |url=https://m.joynews24.com/v/1462094 |access-date=28 Maret, 2022 |website=Joynews24 |language=ko |archive-date=March 25, 2022 |archive-url=https://web.archive.org/web/20220325061509/https://m.joynews24.com/v/1462094 |url-status=live }}</ref> Para anggota terungkap melalui ''"The First Moment of Le Sserafim"'' dari 4 April hingga 9 April (berurutan: Sakura, Kim Ga-ram, Hong Eun-chae, Kim Chae-won, Kazuha, dan Huh Yun-jin.)<ref>{{Cite web |last=Moon |first=Wan-shik |date=April 4, 2022 |title=르세라핌 사쿠라, 청순·도도·우아..Beautiful |trans-title=Le Seraphim Sakura, innocence, dodo, elegance..Beautiful |url=https://n.news.naver.com/entertain/article/108/0003041189 |url-status=live |archive-url=https://web.archive.org/web/20220404000213/https://n.news.naver.com/entertain/article/108/0003041189 |archive-date=4 April, 2022 |access-date=6 April, 2022 |website=Star News |language=ko}}</ref><ref>{{Cite web |last=Kim |first=Joo-hee |date=April 5, 2022 |title=르세라핌, 사쿠라 이어 김가람 공개…내일은 누구? |trans-title=Le Sserafim, Sakura and Kim Garam revealed… who tomorrow? |url=https://n.news.naver.com/entertain/article/003/0011103426 |url-status=live |archive-url=https://web.archive.org/web/20220408034739/https://n.news.naver.com/entertain/article/003/0011103426 |archive-date=8 April, 2022 |access-date=6 April, 2022 |website=Newsis |language=ko}}</ref><ref>{{Cite web |last=Ahn |first=Byung-gil |date=6 April, 2022 |title=르세라핌 홍은채 공개 ‘2006년생 입니다’|trans-title=Le Sserafim, Hong Eun-chae mengungkapkan 'Saya lahir pada tahun 2006'|url=https://n.news.naver.com/entertain/article/144/0000804110 |access-date=6 April, 2022 |website=Sports Trend |language=ko |archive-date=8 April, 2022 |archive-url=https://web.archive.org/web/20220408034739/https://n.news.naver.com/entertain/article/144/0000804110 |url-status=live }}</ref><ref name=":0" /><ref>{{Cite web |last=Yoon |first=Sang-geun |date=April 8, 2022 |title=르세라핌 5번째 멤버는 카즈하..네덜란드 발레 전공 '우아한 비주얼' |trans-title=The 5th member of Le Sserafim is Kazuha..Dutch ballet major 'Elegant Visual' |url=https://n.news.naver.com/entertain/article/108/0003042798 |access-date=8 April, 2022 |website=Star News |language=ko |archive-date=7 April, 2022 |archive-url=https://web.archive.org/web/20220407234144/https://n.news.naver.com/entertain/article/108/0003042798 |url-status=live }}</ref><ref>{{Cite web |last=Ahn |first=Hana |date=9 April, 2022 |title=르세라핌, 마지막 멤버 허윤진 공개...일렉 기타 메고 ‘당당+열정’ |trans-title=Le Sserafim, last member Huh Yun-jin revealed... Electric guitar carrying 'Dangdang + Passion' |url=https://n.news.naver.com/entertain/article/057/0001654974 |access-date=April 9, 2022 |website=MBN Star |language=ko |archive-date=9 April, 2022 |archive-url=https://web.archive.org/web/20220409010026/https://n.news.naver.com/entertain/article/057/0001654974 |url-status=live }}</ref> Pada 13 April, Source Music mengumumkan bahwa Le Sserafim akan merilis album mini debut mereka, Fearless pada 2 Mei 2022.<ref>{{cite web|url=https://n.news.naver.com/entertain/article/311/0001433859|script-title=ko:르세라핌, 5월 2일 데뷔…하이브 '월클' 제작진 총출동|trans-title=Le Sserafim akan debut pada 2 Mei... Kru produksi 'Walkle' Hybe|work=X Sports News|language=ko|date=13 April, 2022|access-date=13 April, 2022|archive-date=13 April, 2022|archive-url=https://web.archive.org/web/20220413011643/https://n.news.naver.com/entertain/article/311/0001433859|url-status=live}}</ref> Pada 21 April, diumumkan bahwa pra-order album telah melampaui 270.000 salinan dalam tujuh hari.<ref>{{cite web|first=Si-yeon|last=Park|url=https://n.news.naver.com/entertain/article/112/0003552451|title=르세라핌 'FEARLESS', 7일만 선주문량 27만 장 돌파..클래스가 다른 데뷔|trans-title=Le Sserafim's 'FEARLESS' surpasses 270,000 pre-orders in just 7 days... Debut with a different class|work=Herald Pop|language=ko|date=21 April, 2022|access-date=21 April, 2022|archive-date=21 April, 2022|archive-url=https://web.archive.org/web/20220421004335/https://n.news.naver.com/entertain/article/112/0003552451|url-status=live}}</ref>
Pada 20 Mei 2022, karena tuduhan kekerasan sekolah dan ''bullying'' terhadap Kim Ga-ram semakin kuat, [[Hybe Corporation]] dan [[Source Music]] menyatakan bahwa Ga-ram akan menjalani masa ''hiatus'' untuk sementara dan Le Sserafim akan melakukan promosi dengan lima orang anggota.<ref>{{Cite web|last=Tim|title=Kim Garam LE SSERAFIM Hiatus Buntut Tuduhan Kekerasan|url=https://www.cnnindonesia.com/hiburan/20220520171104-234-799172/kim-garam-le-sserafim-hiatus-buntut-tuduhan-kekerasan|website=hiburan|language=id-ID|access-date=2022-05-30}}</ref><ref>{{cite news |date=20 Mei 2022 |title=Le Sserafim's Kim Ga-ram takes a break due to scandal |trans-title=Kim Ga-ram Le Sserafim mengambil istirahat karena skandal|website=The Korea Joongang Daily|url=https://koreajoongangdaily.joins.com/2022/05/20/entertainment/kpop/korea-kim-garam-le-sserafim/20220520163047541.html |access-date=20 Mei 2022}}</ref> Pada 20 Juli 2022, Hybe Corporation dan Source Music mengumumkan pemutusan kontrak dan pemberhentian Kim Ga-ram dari Le Sserafim. Mereka secara resmi akan melanjutkan aktivitas sebagai grup beranggotakan lima orang.<ref>{{cite web|url=https://hot.detik.com/kpop/d-6188332/breaking-hybe-putus-kontrak-kim-garam-le-sserafim-lanjut-berlima|title=Breaking! HYBE Putus Kontrak Kim Garam, LE SSERAFIM Lanjut Berlima|author=Delia Arnindita Larasati|website=[[detikcom|hot.detik.com]]|access-date=2022-07-20|archive-url=https://web.archive.org/web/20220720030754/https://hot.detik.com/kpop/d-6188332/breaking-hybe-putus-kontrak-kim-garam-le-sserafim-lanjut-berlima|archive-date=2022-07-20}}</ref>
== Anggota ==
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