Secan refs and art
In public canon Lainey was going to be introduced during the Solar Fair as Norma’s girlfriend and Song is Sly’s friend who she meets during the Solar Fair
In secret canon, Sly confides in Barry about his crush on Eve, and he sends her to a kindred support group. There, she meets just Song, who has a crush on his sister Lainey. They add each other on disharmony but Sly doesn’t go to that support group again. Years later, when Norma and Eve start publicly dating, Barry sends them to the same kindred support group and there they meet Song and Lainey, who are dating now. Norma develops a crush on Lainey and they start dating.
Tune is a fersona Sly and her friends make for Song after he joins their disharmony server
Also worth noting that Lainey is Getty’s self insert