Well, the first of them 

Her name is Raincloud Song, though she goes by Rainsong or just Rainy~ 

She’s a heartbreaker and flirts with pretty much everyone really, but mares are more to her tastes. She’s been with so many ponies she might not even remember. Though she doesn’t really date people seriously, most of her relationships are just flings, no strings attached. 

Besides that, Rain’s a pretty good flier and has made Mama Dash proud joining flight camp and even giving a shot at Wonderbolt Academy, but for Rainbow’s dismay, she never followed the career. Rainy eventually becomes a singer, which is what her career is about. 

_{Original design and color scheme adopted from unicorn-mutual}