B) Star Swirl's fellow wizards, who helped him raise and lower the sun and moon, and take care of The Royal Sisters

All getting progressively more tired as the story goes.

Lavender Bloom
-- Primary caretaker of the three sisters. Her coat is a greyish blue color, her mane soft lilac. She has greenish-blue eyes, and a Cutie Mark consisting of three purple flowers. A calming, and happy presence. Physically weak.

Misty Leaves
-- Stern, rule setter. Cooks, very fussy about the state of the house. Thinks she does all the work around the house. She does a lot but not all of it.

Bitter Britches (PAH! XD)
-- More grumpy than Star Swirl. Is the eldest and asserts himself. Usually complaining about something. Architect. He did a bit too much of it growing up and now his bones are complaining XD.

tired from the start
-- A bit lazy, sometimes falls asleep standing up.

Sunny Daze
-- Helps Star Swirl with the teaching of the children. Needs glasses but I dunno if glasses exist in this time lol. So he's constantly squinting and bumping into things cuz he can't see shit.

Having no one else to do their job

To cycle day and night for Eqwestwia (lmao did I fuckin' write that??)

The extreme amount of energy needed to move the celestial bodies. This puts them under stress.

Losing their magic completely.