Lyon Vastia (リオン・バスティア Rion Basutia) is an Ice-Make Mage of Lamia Scale and its current ace.[3] He is also the rival of Gray Fullbuster, and was first introduced as Sub-Zero Emperor Lyon (零帝リオン Reitei Rion).

Lyon is a slim young man of average height with a muscular and toned body.[4] He has bluish silver hair, most of which are spiky strands that jut upwards on top of his head, except for some which are kept pointing down and partially cover the upper left part of his face. Lyon’s eyes are slanted, with dark round pupils and surrounded by similarly dark lines. He has small, linear, dark eyebrows. During his first appearance, he donned a small, light-colored earring on his left earlobe, which takes the shape of a stylized snowflake.[5] After joining Lamia Scale, Lyon had the guild stamp imprinted on his right pectoral, in the same spot where Gray Fullbuster has his own Fairy Tail stamp.[4] Upon Team Tenrou's return seven years later, the only difference in Lyon's look is reappearance of an earring on his left ear, larger than his first one and seemingly consisting of a small chain as well.[6]