Grima is the antagonist of Fire Emblem Awakening. He is a dragon with a serpentine, almost insectoid appearance, and multiple eyes. He is worshiped by a cult who seek to bring about his resurrection.

SPOILERS for Fire Emblem Awakening
Towards the end of the game, Robin is revealed to be a vessel for Grima. In the original timeline, Robin willingly surrendered their body and mind to Grima, allowing him to destroy the world. When Lucina traveled back in time to avert this fate, the corrupted Robin traveled back as well. This Robin serves as the "face" of Grima during their final confrontation.

A younger Grima also appears in Fire Emblem Echoes as an optional superboss. There, he is revealed to be an artificial lifeform created by a mad alchemist.