Tessarion

Tessarion was Daeron Targaryen's dragon — youngest of Viserys I's sons by Alicent Hightower, and by most tellings the most soldierly of the greens' princes, sent west and south to the Reach to rally House Hightower's strength for his brother's cause while his elder siblings fought closer to the capital. The Blue Queen carried him well; Daeron the Daring, as the histories came to style him, proved a genuinely capable field commander at the head of Ormund Hightower's host, and Tessarion's cobalt-and-copper wings became as familiar a sight over the Reach's armies as any banner.

It ended at Tumbleton, twice over. The town changed hands once already amid treachery — Rhaenyra's dragonseed riders Hugh Hammer and Ulf White turned their borrowed dragons against her cause there for a better offer — and when the blacks returned in force for a second reckoning, Tessarion was drawn into a three-way dragon battle against Seasmoke and Vermithor that the Citadel still ranks among the costliest single engagements dragonkind ever fought. All three dragons died in the tangle, their riders with them, and Tumbleton itself burned so thoroughly that the maesters credit the fires still smoldering weeks later — a single afternoon that cost the war three grown dragons and left the smallfolk of the Reach cursing both colors equally.