Image imported from derpibooru 
Original Description:
 
While she has power over the movement of the sun, poor Galaxia sadly is just as vulnerable albeit more durable as everypony else around her is to the heat and the burning light of one of the orbs she commands. As such when ever going out to engage in summer festivities, her friends make due to remind the young (yet aged due to her Tia and Lulu parts) alicorn that her skin and coat is best to have sunscreen on as everypony else, plus it would make for a better example for somepony like her son as she is one of the little boys role models. With this Galaxia embarrassingly and begrudgingly accepts the coat of lotion, and who better to apply it than the mare of two of her former Twilight’s components friends fused in the fusion striped mare that is Princess Mythic Majestic.