She wears a plague doctor's mask and wears a hat.
She has hooks for hands.
In Simpsons Comic 2009, she is naked and emaciated and has a more skeletal appearance, and wears a blue bow. Also, in the same comic, a skeleton that resembles Maggie is seen near the settee, suggesting that the current Maggie murdered the real Maggie and took her place  , or a sign that maybe Maggie has outgrown a need for a skeleton.
When she speaks, she usually growls. She tends to be irritable, to the point of damaging things, as seen in Snospis Eht: Christmas Special: Part 02 when she rips a Christmas wreath off the wall and in Snospis Eht: Christmas Special: Part 03 at Christmas dinner when she flips the table over after becoming irritated at Homer.
She also smokes cigarettes.
She goes to piano school.
See: Maggie: Relationships.
- Raols Issue 2
- Simpsons comic 2009
- Marge simpsons blog 01 (mentioned)
- Snospis Eht: Christmas Special: Part 02
- Snospis Eht: Christmas Special: Part 03
- Snospis Eht: Marges Day: Part 1
- Snospis Eht: Ned
- Snospis Eht: Dreams Again.
- Snospis Eht: Marge's Juice