Tweek is a blond haired green eyed siren. He has a horrible singing voice but if one listens to it way to much they would be under the siren spell, the singing would suddenly sound good and the victim would be lured into the ocean. Tweek has a unique body his siren tail has mini spikes on it making it prickly to the touch, the color is a golden yellow which hides those spikes. He can spike up the rest of his body as self defense like a pufferfish. He has a love for Craig and is also gay.