ONiON

ONiON is a 3★ character in Reverse: 1999.

ONiON was released on October 26, 2023. They were introduced alongside A Knight, Dikke, Darley Clatter, Cristallo, Click, Eternity, AliEn T, An-an Lee, Baby Blue, Balloon Party, Charlie, Tennant, Satsuki, Sweetheart, Sputnik, Bette, Bkornblume, Druvis III, La Source, Lilya, Matilda, Medicine Pocket, Sotheby, Mesmer Jr., Ms. Radio, Pavia, Poltergeist, Rabies, Sonetto, The Fool, Nick Bottom, APPLe, TTT, Twins Sleep, Voyager, Bunny Bunny, X, Зима, Necrologist, Mondlicht, Ms. Moissan, Leilani, Ms. NewBabel, Erick, Oliver Fog, Regulus, John Titor, Centurion, Door, Eagle, suggesting they were part of the same content update.