Similar to how if Calamities continued to cause damages Heroic names would rise against them. In this manner when prince Dorian was ran out of the kingdom of Helike when Kairos took power he assumed the name of the Exiled Prince. Most likely his name is to assume the opposite aspects of the tyrants as his nemesis. His name is heroic despite being part of a mercenary crew similar to Robin Hood.
Its holder was eventually killed by a crossbow bolt because he wasn’t wearing a helmet.