A knight and youngest son of Lord Mace Tyrell. He is young and handsome with a mass of brown curls.

Ser Loras advances to the final round of the Hand's tournament by distracting Ser Gregor Clegane's warhorse by riding a mare in heat. Ser Gregor nearly kills him in a rage before Sandor Clegane intervenes. Ser Loras, grateful for being saved, forgoes the last round and conceeds the tournament to Sandor.

Ser Loras stays in King's Landing after the tournament for a long time afterwards, working with Lord Renly Baratheon to get King Robert Baratheon to cast aside his queen, Cersei, and marry Ser Loras's sister Margaery instead.

He flees King's Landing with Lord Renly shortly before Robert's death and helps convince his father to support Renly's claim for the throne.

Loras is given a place on Joffrey's Kingsguard for his service in the battle against Stannis.