ZENSHU

Based on the anime called ZENSHU, you should watch it :D, it sadly only got 12 episodes but was about a animator who was isekia'd into her favorite childhood movie, called 'A tale of perishing', where these creatures called 'Voids' tried to destroy these markposts and there was only one left, the isekia'd animator had the ability to bring her animations to life at the cost of her energy, making her sleep for as long as it should take to have animated what the character she made would do, go into plot in setting to fill out your character info,