Alias Lord Mandy, President Mandy
Classification Human
An immortality giant worm (in a potential future)
Brain eating meteor
Gender Female
Age 9
Residence Endsville
Relatives Claire (mother)
Phillip (father)
Jeff (adoptive son)
Velma Green (ex-daughter-in-law)
Spider hatchlings (adoptive paternal grandchildren)
Billy (future husband)
Sis (future paternal aunt-in-law)
Pets Saliva
Affiliation Underfist
Occupation A Student at Endsville Elementary
Ruler of the world (in the future as a giant worm)
The Supreme leader of the Kids Next Door (briefly)
A napkin collector
President of the United States (Underfist)
Real world information
Appears in Grim & Evil
The Grim Adventures of Billy & Mandy
Billy & Mandy’s Big Boogey Adventure"
"Wrath of the Spider Queen
Underfist: Halloween Bash
The Grim Adventures of the Kids Next Door
First appearance “Billy and Mandy in Interpretation of the Skull and You"
Voice actor Grey DeLisle

Mandy is the strict and sometimes bossy friend of Billy, Grim, Irwin and Pudd'n. Her true heart changes in the season 8 episode: Heart Change. She is voiced by Grey DeLisle Griffin in the series.



  • According to Felicity, it is revealed that she wears pink.
  • When Mandy's true heart changes at the end of the season 8 episode: Heart Change, she becomes just the way Irwin had become.