So I was in a pony group chat on Skype, I don't really talk there but I felt like it. I did a few requests for fun, when this came up:

"Tired Goru: Can Atryl make Celsetia’s long lost sister who controls time who has bat wings look good in a sailor suit?"

So yea. She lives in the timeflow and can go left and right, she's a prankster and a muse, and apparently has a thing for sailor suits, that's her thing. Her mane is hourglass sand :)

(don't take her seriously it was just a joke sketch I finished because why not)