Piral was the Xindi offspring of Naara and Degra and the sibling to Jaina and Trenia. Piral and Jaina lived on Azati Prime. (ENT: "Stratagem")
A communications log found aboard a Xindi-Aquatic escape pod acquired by the crew of Enterprise revealed the names of Piral, and two other siblings, as the names of supervisors requesting additional parts. (ENT: "Damage")