The heart of man ish compaplicated.
Barkeep is a Hypello in Final Fantasy X-2 who works with the Gullwings. Although the specific details are not known, Brother found Barkeep and took him aboard the Celsius, the Gullwings' airship. Barkeep runs the "bar" aboard the ship, and, as no one knows his actual name, he is simply referred to as Barkeep.
If the party rests once per chapter, after resting for the final time an extra cutscene is played showing Brother and Barkeep talking about Brother's infatuation with Yuna, and Barkeep reveals he has a partner called Darling, much to Brother's dismay. From this point, players can rename the animals that appear when using the Trainer dressphere.
During Chapter 1, if the player rescues O'aka XXIII and takes him on-board the airship, he opens a shop with a set debt, opposite Barkeep's bar. By buying items from him, the player decreases his debt. If the player clears his debt before the end of Chapter 2, O'aka will sell his items at 10% of the price, which is less than the money received if the player sells the same item to Barkeep. So, by buying an item from O'aka, then selling it back to Barkeep, the player can make a profit.
- His Japanese name, Master, reflects the Japanese culture of how customers would address the owner of a bar.