She has black pupils, but on some occasions, she is shown to have blue eyes.
Such as in My Peeps, after zapping Billy with his scythe, she and Grim are both seen in anime form revealing Mandy to have blue eyes and a small angular nose.
Although she has black eyebrows that are thick and they are almost always furrowed and a frown to match which gives her a scowling expression most of the time, and her hair is curved into a style resembling devil horns.
In the show's regular art style, she has no visible nose, but small nostrils.
It is also shown in the movie that Grim and Billy are actually very meaningful to her and she feels truly alone and lost without them.
Mandy was the main antagonist of the crossover episode The Grim Adventures of the Kids Next Door, as she took over the Kids Next Door’s Moonbase and nearly dominated the entire Cartoon Network multiverse.
However, this did not apply in some earlier episodes, where she smiled only to her friends Billy and Grim.
Mandy also has superior intelligence and strength not to be reckoned with.
This is probably Mandy's most villainous role ever.
Although Mandy rarely smiles, she is shown to smirk in times when she wins or if she is concocting a very sinister plan.
When she did, he immediately pointed out that she had no nose and shoved an ice cream cone into her face after she had asked him if he was "some kinda idiot? She punched him, called him a creep, and slammed the door in his face.
He simply giggled in response to this, telling "she digs me", thinking that she liked him.