The Ending Of Skinamarink Explained

The mysterious entity of "Skinamarink" is never given a confirmed identity. Even when Kevin asks for its name at the end of the film, it doesn't give an answer. However, based on the entity's female figure, it's possible that this supernatural figure could be Kevin and Kaylee's mother. We never see their mother prior to their father disappearing and she's only mentioned briefly. Plus, even while we do see the father talking to someone about Kevin's accident at the start of the film, it's never confirmed that he's talking to Kevin and Kaylee's mother. 

Now, it's worth noting that the entity does some pretty horrific stuff to Kevin and Kaylee, including making Kevin harm himself, so it is also possible that the entity just takes this form to more easily lure the children. But despite its cruel actions, there's still a motherly feel to the entity that doesn't go unnoticed. Its sudden appearance shortly after Kevin's accident is likely no coincidence and possibly acts as the key reason for its presence. Maybe in some twisted way, it thinks it's protecting Kevin by isolating him, and taking the appearance of their mother would definitely make it easier to get Kevin and Kaylee on its side.