The save file icon consists of 3d "kawaii" models of Jen and Scree. Kawaii means "cute" in Japanese style. These models seem to reflect that type of style. Someone like Primal' plushies might look like.
To see the save file icon you must boot into the console browser, then examine the save files on the memory card.
When examining a specific Primal save file a larger version of the icon is shown close up and rotating.
Primal's brother game, Ghosthunter, has an animated monster teddy bear taken from the game. When a specific save file is examined the model is shown