Reading it, too, albeit this version's a little off.
Spoiler:
She first shows up in Frontier (for some odd reason, is referred to as "Pioneer" in this chapter) as a hotshot performer, but Alto's about to prove himself as a moderating factor when it comes to her attitude.
LOL, first encounter with Ranka... like she's witnessing a reenactment of Snow White, before it turns out they're not alone, as Alto's watching them, too.
Later, Sheryl shows her soon-to-be imoto what it takes to be a star: "KEEP SINGING!"