Cosmo

spiky pink shoulder-length hair fashioned into pigtails with red hair bands

She also has hearts for pupils, colored pink

her right eye usually hangs out of its socket.

The upper right side of her head is gone, exposing her brain

The trailing part of her brain is tied into a bow at the end.

She wears a long sleeved cropped orange sweater, light blue high waisted shorts, and pink sneakers.

On the surface, Cosmo doesn't exhibit many emotions aside from her usual smiling, happy-go-lucky attitude.

Submissive

He is only able to say the word "Halloween".

Affectionate