|Relatives|| Grim (Son)|
Granny Grim (Mother or Mother-In-Law)
Kali (Aunt or Aunt-In-Law)
|Real world information|
|Appears in||The Grim Adventures of Billy & Mandy|
|First appearance||"A Dumb Wish"|
|Voice actor||Candi Milo|
Her name was given as "Miriam" only in passing. Miriam is either the daughter or the daughter-in-law of Granny Grim; and the niece or niece-in-law to Kali--but the relation is never verified in the series run, only by the virtue of their relation to Grim.
- A Dumb Wish - makes an appearance after being released by Billy from a lamp and could grant wishes.
- Billy and the Bully - seen in silloutte in Grim's flashback, wearing black robes like Grim's, advising Grim about bullies with the whole 'sticks and stones' speech.
- A Grim Prophecy - makes an appearance filling Grim in about his new position as the Grim Reaper, refers to Grim as her "Little Grimmy".
- Dad Day Afternoon - referred to as "Miriam" over the phone by Grim's father.
- Scary Poppins - mentioned to Billy by Grim, right before he zaps Mandy's parents; "Yes, "Careful" be me middle name... Oh, how I never forgave my mother for that".