Auricular muscles (anterior, superior and posterior)
Three small muscles around the outer ear connect it with the scalp and the bone behind the ear.
Attachments & illustration source
Auricularis anterior runs from the galea in front of the ear to the anterior auricle; auricularis superior connects the galea above the ear with its upper surface. Auricularis posterior connects the mastoid region with the posterior auricle.
Original anatomical illustration. Fine attachment boundaries are simplified.
Anatomy reference 1