Making the head a static image which always faces you?

exactly as the question states. i am making a personal avatar of this fellow (attached to the bottom); as his head is stylized and i’d like to keep it that way, i want to make the head a static image which always faces the viewer (e.g. Sisyphus Prime, from ULTRAKILL).
if this is not possible, what could i do in order to make it retain its stylized appearance while still looking good in 3D?

You probably can’t do this with quest compatible shaders, but the billboard shader in the standard lot is what u want.