The character is low poly and designed for phone games. Rig is not available. You can easily rig it from Mixamo and create the animation you want. Since its face is plane, you can add a different atmosphere with any expression you want.
Model information: The model is Low resolution.
Polygons : 643
Vertices : 727
Tris : 1,332
Mesh : 9
File types:
Blender - Package Texture
FBX - unrigged
OBJ - unrigged
RAR - Texture