Eastmumsie the Everliving was the leader of the Fungus Gnome community of the Daverwood, until she was absorbed into the Deep Mycelium after a brief power struggle with her erstwhile deputy, the Learned Leatherbean. Eastmumsie's fall from power was precipitated when it came to light that she had abused the corrupted Element of Loyalty during her rise to power as Elder, but underlying disagreements about her possible responsibility for failure of the Sixth Generation of fungus gnomes to appear may have also been involved.

Eastmumsie was a third-generation fungus gnome, being one of the third generation of fungus gnomes to ever live on Equus.