Est is the youngest of the Pegasus Sisters of Macedon under Minerva's command. Unlike his elder sisters Palla and Catria, he joins late in the game, as he decided to steal Mercurius before returning.

Him and his sisters also appear in Fire Emblem Gaiden. According to Est, Palla, and Catria's base conversations in the remake, Est had left the Whitewings the day after the War of Shadows, wanting to open up a shop with his wife and live a normal life. Unfortunately, Est ends up getting captured by Grieth, and his sisters follow the pirate ship to rescue him, but they lose sight of it near Zofia Harbor. Jesse tries to save Est, but gets captured. After Celica's party rescues Jesse, they travel to Grieth's fort, defeat Grieth, and save Est. After the war, he returns to Archanea with his sisters, but promises to come back some day.