Cartoon blonde woman using smartphone Low-poly 3D model

How to link/appendFirst off, ask yourself if you even NEED to link or append the rig into another file. Probably not! But if you do:

Link/Append the collection whose name starts with CH.In the 3D View Header: Object -> Relations -> Make Library Override.Save and Reload the file, to allow scripts to execute. (This will also fix her materials)Then simply enter pose mode on the armature and start animating!