“Thank you, Champions of Utna. Thanks to you, everything can be set right again. I am Miradona. Long have I slept beneath this earth, as all emiyu must. Centuries ago, my blood brought great calamity to the humans living here... I never realized how much damage was done until it was too late... I will make everything be as it should. The soul of Kalbazan is sealed away once more, and Gwenchaos and Teeta shall have their eternal rest. Let this temple be purified... Yutona's daughters will awaken soon. No longer will darkness hound them. May their lives be filled with happiness... I will return to the earth once more. You have my eternal love and thanks, O chosen ones of Utna. You have made my life as blessed as the days when I walked among you. I will cherish the short time I have spent alongside you as I join my brothers and sisters in their eternal sleep... Farewell, humans. With your courage and love for others, I know that Heaven will bless you...”
—Miradona, to the heroes after Gerxel's defeat
After the extinction of the Emiyu race, Miradona traveled to the continent of Lieberia alongside her four dragon followers. There, she slept within the ground for several hundred years. Eventually, the Zoan clan leader Kalbazan entered the temple where Miradona slept in the form of a gigantic white dragon. Thinking that she was the fabled dark god Gerxel, he drank her blood and transformed into a dark dragon, renaming himself "Gerxel". When Utna was sent to the temple to be sacrificed to Gerxel, Miradona saved her and gave her blood to drink, as well as Emiyu treasures to save humanity.
Miradona appears before the heroes after Gerxel is slain by a combined attack from Runan, Holmes, Sennet, and Tia. She praises them and declares that she will seal Gerxel's spirit, release Gwenchaos's and Teeta's souls, and purify the underground temple. She also reveals that she will become one with the land of Lieberia and follow the destiny of her race. Before leaving, she resurrects Enteh, Katri, Neyfa, and Richard, allowing them to reunite with the heroes.
- Miradona seems to be based on Mila from the Fire Emblem Series.
- Miradona is the only character in TearRing Saga: Utna Heroes Saga whose portrait is animated; her eyes blink, her mouth moves while speaking, and her hair flows.