An unofficial trio of virtual youtubers from different groups, all designed by the same artist, Saine, and considering themselves 'sisters', sometimes appearing on each other's channels. The trio originally consisted of Kamishiro Kurea (formerly Otogi Resurrection, now indie), Sephira Su (Fensi) and Suzuhara Lulu (Nijisanji), until 2021, when Su retired in January and Lulu in June of that year.
Since then, Kurea has been joined by fellow indies Hoshikage Lapis and Watagashi Unou, as the new Saine Sisters.