Mar 22 Introduced herself as an independent VTuber.<ref>https://youtu.be/1dOyVEls4pg</ref>
Nov 22 Released her first original song, "comet" on November 22.
Mar 22 Released her second original song, "天球、彗星は夜を跨いで".
May 19 Appeared as a surprise guest performer at AZKi's first live "The Shitest Start" and joined hololive's music label INoNaKa Music(INNK).
Nov 29 Announced her transfer to hololive's main branch on Twitter.
Dec 01 Officially transferred to hololive's main branch and received an updated model and outfit.<ref>https://youtu.be/EkBM9U51RSs</ref>
Jan 20 3D debut announced for early March.<ref>https://youtu.be/r2oP_aINtQg</ref>
Jan 24 Participated in hololive 1st fest Nonstop Story and debuted her 3D idol costume.
Jan 31 Passed 100,000 subscribers on YouTube.<ref>https://twitter.com/suisei_hosimati/status/1223247615971643397</ref>
Mar 01 Officially debuted her 3D model.<ref>https://youtu.be/FZnG1t34wCs</ref>
Mar 21 Celebrated her 2nd anniversary and birthday with a 3D stream, and also showed her third original song "NEXT COLOR PLANET" for the first time.
Mar 22 NEXT COLOR PLANET officially released on Youtube through a premiere.
Apr 06 Passed 200,000 subscribers on YouTube.<ref>https://twitter.com/suisei_hosimati/status/1247110891574706177</ref>
Jun 02 Passed 300,000 subscribers on Youtube.<ref>https://twitter.com/suisei_hosimati/status/1267828344348786690</ref>