I've made some 3D-rendered sprites that you can use and edit freely for any project, practice, or whatever you want. They are published under CC0 1.0 (public domain).
There are four custom original female-appearing sprites with three expressions each - smiling, surprised and frowning. There are also three images of them interacting that can be used for CG scenes or endings or whatever you want.
The images are in .png format with transparent background and sized to fit a 1290 x 1080 resolution.
Download the assets on itch.io here.
Enjoy!