Wantz is the little brother of O'aka XXIII in Final Fantasy X. He appears at seemingly random times in the game to take pictures of Yuna. At the Moonflow, he's seen being bullied by Biran Ronso and Yenke Ronso. After Yuna is branded a traitor of Yevon, Wantz's brother is imprisoned for helping Yuna, and he decided to take over his business as a merchant.
He and O'aka had a sister who was a summoner. She passed away approximately seven years before the events of Final Fantasy X. If the player revisits the Farplane just after the initial events there, before heading on to the Thunder Plains, they can find Wantz talking to her there. He shows her a sphere of Yuna and says that they look alike. He promises that Yuna will beat Sin for her.
During the Eternal Calm, O'aka and Wantz had a feud, and Wantz was kicked out of the family business for believing that the Macalania Travel Agency would fail without the Temple. However if the Gullwings complete all of O'aka's side-quests, he and Wantz will reunite at the Agency, although their feud doesn't seem to be over.
|Tidus - Auron - Rikku - Wakka - Lulu - Yuna - Kimahri|
|Temporary playable characters|
|Jyscal Guado - Kelk Ronso - Wen Kinoc - Yo Mika|
|Chappu - Clasko - Elma - Gatta - Lucil - Luzzu - Lord Mi'ihen|
|Belgemine - Braska - Dona - Gandof - Isaaru - Ohalland - Yocun - Yunalesca - Zuke|
|Barthello - Biran Ronso - Borra - Brother - Calli - Cid - Ginnem - Jecht - Maechen - Maroda - O'aka XXIII - Omega - Pacce - Rin - Shelinda - Tidus' Mother - Tromell - Wantz - Yenke Ronso - Yu Yevon - Zaon|
|Baaj Temple - Besaid Island - Kilika Island - Luca - Mi'ihen Highroad - Mushroom Rock Road - Djose - Moonflow - Guadosalam - Farplane - Thunder Plains - Macalania - Bikanel Island - Bevelle - Calm Lands - Monster Arena - Cavern of the Stolen Fayth - Remiem Temple - Mount Gagazet - Zanarkand - Zanarkand Dome - Omega Ruins|
|Al Bhed - Guado - Hypello - Ronso|
|Aeon - Blitzball - Butterfly Hunt - Calm - Celestial Weapon - Chamber of the Fayth - Chocobo Knights - Cloister of Trials - Eternal Calm - Fahrenheit - Fayth - Fiend - Final Aeon - Guardian - High Summoner - Hover - Jecht Shot - Machina - Maester - Overdrive - Overdrive Mode - Overkill - Pilgrimage - Pyrefly - Rin's Travel Agency - S.S. Liki - S.S. Winno - Sending - Shoopuf - Sin - Sphere - Sphere Grid - Summoner - Unsent - Warrior Monks - Yevon|
|Original Soundtrack - Promo CD - Suteki da ne - Vocal Collection - Feel/Go Dream: Yuna & Tidus - Piano Collections - Official Soundtrack
|Abilities - Armor - Auto Abilities - Black Magic - Characters - Chronology - Enemies - Enemy Abilities - Items - Locations - Ronso Rage - Translations - Walkthrough - Wallpapers - Weapons - White Magic|