According to him, he is "immune to the plot", "can transcend time and space", and kills anyone when he feels like it. He is friends with the equally as violent Birthday Boy Blam. According to the developer commentary and the newspaper The Beaver holds, Flumpty kidnaps the player because he feels like it, and he wants a friend. If he catches the player, he will kill them, resulting in a jumpscare and not becoming friends. If they survive, the player and Flumpty become best friends.
He is a large, pearly white, anthropomorphic egg, with a constant smile on his face when he isn't killing the player. He has black, oval dots for eyes, a button nose, and thin, flimsy looking, cartoon-like, stick-like limbs.
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