Migroo was a male stoat and one of the original members of Ferahgo the Assassin's horde. He was fairly unintelligent and had a reputation for being dim-witted. After Migroo failed to recapture Mara and Pikkle, Ferahgo cut Migroo's ear off as punishment. Later, Klitch captured Sapwood and Oxeye, and Migroo and Feadle were left to guard the captives.
When the hares yelled about an attack from a large fish, the stoat captain investigated, hoping to acquire a decent dinner. Unfortunately for Migroo, the effort was a clever ruse, as Oxeye had freed himself from his bonds. Taking Feadle's spear, the big hare ran it through Migroo, killing him.