Uchu Seijin

Thri-Kreen heir-apparent to the throne of the kingdom-city Vermithrax, Prince Seijin has been quested to secure alliances and earn his place on the throne.
Coming of age in a royal family was often as comfortable as one would expect, but far more competitive than most childhoods. Aside from the usual courtly etiquette and cloak-and-dagger politics, Uchu also had to compete with the rest of brood for the attention of court and his father- after all, it can be difficult to stand out when you have 50 other siblings! But stand out he did, and eventually he fought his way (figuratively and literally) to the top of the list to potential successors.
King Zangyack (known to some as the Scorpion King) has been an unusually long-lived ruler, especially for a race that does not often live more than 30 human years, and like all powerful kings he seeks to extend his reign as long as possible. While their home has been besieged by humans and their allies as long as it has stood, it has become a haven for other non-human races such as Lizardfolk, Skaven, and Aarakocra- anything that a Man would look down upon and call a pest. Uchu has stood above all in his father's court in regards to physical combat, he has needed to. Though few advisors are as long lives as the likes of Elves, it is not uncommon for a particular advisor to overseen several generations of kings, but the Thri-Kreen excel at using their intimidating visage to keep their subjects in line- but the transition of power can still be risky. Not wanting to be lost to the potential corruption of magic that other rulers have fallen to in the past (and that he fears his father may yet), Uchu has sought the teachings of asceticism in the hopes of finding more physical ways to extend the limits of his own life. 
His training and ladder-climbing has finally come to one final test- a ritual coming of age quest, where he and many of his surviving siblings are scattered to the far corners of their world and beyond in order to test their strength and prove themselves worthy of the throne-or perish in their attempt. Prince Seijin has set his sights Alshifa, seeing the Yuan-Ti there as kindred spirits and potential allies. And what better place to test his strength than the deadly unknown depths of an ancient ruin?