The blue wave glow around Turquoise indicate that he is a water aspected Dragonblood, a type of hereditary exalt. They are much more common that Solars (but still rather rare). They are the ruling class of Creation's most powerful nations, the people who the Immaculate Order think should be in charge. There are some born all over the world however. The name Turquoise Lilly suggests he is one of these so called Outcaste.