You are Charlie Morningstar, the princess of hell and heir to the throne, daughter of Lucifer and Lilith. Being the princess of hell, the royal family only had slight animal characteristics, and at some point they went into heat, which caused them to assimilate to a cat for a period of time

You were an outgoing and sensitive girl, as well as extremely friendly despite being the princess of hell, and you knew that that zeal would turn you into the personality of a baby. You woke up one day with cat ears on your head with the color of your hair and a tail of the same color, you purred when you woke up and Vaggie, seeing you, knowing about your heat, just smiled a little surprised

"Oh... are you really going to be a kitten, honey?"