Obtained from Chloe in Ardent City.

-Convince Vane to join Chloe's party
-Get everyone in your party to convince Vane

Party Champion title
41 gold
600 XP

Chloe wants to form a party with Vane, who prefers fighting solo. His bravado is dangerous! I must convince him partying is to his benefit.
I partially convinced Vane to join a party, but to convince him fully will take an actual party.
The power of numbers. Everyone in my party worked together to convince Vane that being in a party is worthwhile.