Wantz Wantz is O ' aka XXIII ' s younger brother in " Final Fantasy X " and " Final Fantasy X - 2 " . He appears at seemingly random times in the game to take pictures of Yuna . At the Moonflow , he ' s seen being bullied by Biran and Yenke Ronso . Later on , Wantz takes over his brother ' s business as a merchant . According to the " Final Fantasy X Ultimania Omega " , Wantz is 22 years old during " Final Fantasy X " . Profile . Appearance . Wantz wears a green and yellow headband , a blue striped shirt , and yellow bandana tied around his waist , dark fingerless gloves , green baggy trousers , and red sandals . He has light skin and red hair . He also has a necklace , though the significance of this is never explained . Personality . Wantz has a kind and friendly personality , and loves his brother and deceased sister dearly . He is overly helpful to Yuna and her guardians , selling them goods under threat of death by Yevon . He gladly takes O ' aka ' s place selling items while O ' aka is imprisoned . Story . " Final Fantasy X " . Wantz 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 in Guadosalam after Tidus says to party that Seymour went to Macalania Temple , 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 . In general , Wantz makes appearances at various points of the game as the story , these are : Kilika Temple , " S . S . Winno " , Luca , Moonflow , Thunder Plains , Mt . Gagazet and Macalania Woods . " Final Fantasy X - 2 " . During the Eternal Calm , O ' aka and Wantz have a fight , and Wantz is kicked out of the family business for believing the Macalania Travel Agency would fail without the Temple . However , if the Gullwings complete all of O ' aka ' s sidequests , he and Wantz will reunite at the Agency , although their feud doesn ' t seem to be over . Shops . " Final Fantasy X " . Wantz is notable for selling optimal equipment in the game , for both of his shops . The equipment with four empty slots in Macalania is especially vital for players who want to create weapons and armor with strong abilities . However , the appearance of Wantz on Mt . Gagazet is missable , and if the player does not speak to him on their first visit , then the young merchant will not appear in Macalania to sell the four - slotted equipments . After talking to Wantz on Gagazet , he will be found at the entrance to Macalania Woods from the Thunder Plains , after obtaining the " Fahrenheit " , and completing the mandatory visit to Bevelle . Mt . Gagazet . The appearance of Wantz on Mt . Gagazet is missable , and if the player does not speak to him on their first visit , then the young merchant will not appear in Macalania to sell the four - slotted equipments . The weapon for Tidus has Firestrike , Icestrike , and one empty slot . Yuna ' s has Initiative and three empty slots . Wakka ' s has Sleeptouch , Silencetoich and Darktouch . Lulu ' s has Magic Booster , Magic + 10 % , Magic + 5 % and an empty slot . Kimahri ' s has Firestrike , Icestrike and Lightningstrike . Auron ' s has Strength + 10 % , Strength + 5 % and an empty slot . Rikku ' s has Alchemy , Strength + 10 % and two empty slots . For the armor pieces , the ones for Tidus and Kimahri have HP + 10 % , Defense + 10 % and two empty slots . Wakka ' s is similar but has MP + 10 % instead of Defense . Yuna ' s has Magic Defense + 10 % , Magic Defense + 5 % , Zombie Ward and one empty slot . Lulu ' s has SOS Shell and two empty slots . Auron ' s has HP + 10 % , Zombie Ward and two empty slots . Rikku ' s has SOS Haste and two empty slots . " Final Fantasy X - 2 " . This shop in Lake Macalania is only available after obtaining an Episode Complete at the Travel Agency during Chapter 5 . Non - " Final Fantasy " guest appearances . " Kingdom Hearts " . Wantz , as a little boy , makes an appearance in " " as a merchant in , along with Jessie , Biggs and Wedge from " Final Fantasy VII " .