Muluigi

Muluigi Mario (nee Gurney) was the wife of Fario, The Mother of Mario and Luigi, The Mother-In-Law of Rosalina and The Adoptive Paternal Grandmother of Jeffy.

Bowser Junior's Nerf War
At the end of the video, she was killed by Fario.

Happy Halloween (Last Appearance)
She was killed by Jeff The Killer.