Thank you for your reply.
I don't know what to do because Unity doesn't have a feature called "sprite stack."
We solved this problem by creating a 3D model and rotating it based on the 2D character.
Thank you.
https://drive.google.com/file/d/1_t9Tu31ejx6i2yqtVTnTTlAreAFYrIEL/view?usp=drive...