Adopted from  milkyyrice

Princess Constellation (Constella to her friends, and to her enemies That Cosmic Royal Pain), is a Monster Celebrity who has made a name for herself in the entertainment industry as playing the part of a Magical Space Princess for the TV show "Interstellar Adventures" which is produced by Mettaton Entertainment Limited. The TV show has Princess Constellation working alongside a group of magical royalty from across several worlds as they defend their star cluster from the evil machinations of an alien known only as Gravestar, and her character is the determined take charge and lead the group to victory sort who is exceptionally loyal to her friends. When things aren't serious and there isn't grave danger though, she tends to be a bit sillier and goofier, except when it comes to astrology.

Outside of her acting, she's a bit more serious but is just as social and fun loving and absolutely loves getting and reading her fanmail, even doing a weekly vlog where she shares her favorites she's gotten.

MONSTER TYPE: Star Fennec (Animalistic)
PRIMARY SOUL ATTRIBUTE: Compassion
SECONDARY SOUL ATTRIBUTE: Bravery