Shuyin Shuyin is the primary antagonist of " Final Fantasy X - 2 " . He bears a striking resemblance to Tidus . When Yuna is given a sphere Kimahri discovered on Mt . Gagazet , showing Shuyin in a cell beneath Bevelle , she mistakes him for Tidus , which sets her off on her career as a sphere hunter . Profile . Appearance . Shuyin has shoulder - length disheveled blond hair and blue eyes . He wears a jacket with a yellow back and pale dark - green front with a blue armlet and red - and - black elbow - long square sleeves . On his left hand he wears a black glove with a green cuff and red elbow - long sleeve , while his right glove is plain black without decorations . He wears black shorts and yellow boots with high footings . His sword has a black hilt and light blue to black blade . Maechen implies Shuyin ' s resemblance to Tidus is more than coincidental , but what he means by this is not made explicit . It is possible that the fayth summoning Dream Zanarkand " dreamed " Tidus in an attempt to recreate what they remembered of Shuyin , as they were charged with remembering and preserving every aspect of the destroyed city . The " Final Fantasy X - 2 : International + Last Mission Ultimania " posits that Dream Zanarkand was created as the ideal representation of the original Zanarkand , a wish given form . Since the original Zanarkand was the model for everything in Dream Zanarkand , this extended to its inhabitants , who would marry one another and have children , continuing the cycle of life . Thus the genes of the dream ' s inhabitants blended to form a unique populace . According to this it is unlikely Shuyin is the direct model for Tidus , as Dream Zanarkand ' s Shuyin should have lived a millennium ago . It is possible , however , that Tidus is a descendant of Dream Zanarkand ' s Shuyin . Personality . Shuyin ' s spirit was corrupted with negative feelings of failing to protect Lenne and hatred for those responsible as he was forced to endlessly relive the memory of his death . Shuyin lost his sanity and became driven by fantasies of revenge against all of Spira . Abilities . Unlike most unsent , Shuyin ' s spirit can possess people , controlling those who are deep in malice . He can also possess fayth , using their aeons to help him . The " Final Fantasy X - 2 : International + Last Mission Ultimania " elaborates in its " Four Puzzles " section that the " Shuyin " who Yuna and others meet is not the original Shuyin , but his " shadow " full of the despair and hatred the Shuyin of 1000 years ago felt , preserved by pyreflies . Places where pyreflies are dense " remember " moments from the past and project them , such as the Zanarkand Dome where Yuna and her guardians witnessed visions during her pilgrimage . In the case of Shuyin these " phantom thoughts " began acting on their own . The difference between Shuyin ' s shadow and a true unsent is that its pyreflies cannot interact physically . While Shuyin ' s shadow lacks physical substance , it can produce extensions of itself , and to influence the state of mind of those around it , as seen inside the Den of Woe . For it to physically interact with the living world the shadow needs to possess someone to act as its vessel . A suitable vessel would be someone in similarly despairing disposition who is strong both physically and spiritually . However , should the shadow ' s vessel lose consciousness , transferring to a new one is not possible . Story . A thousand years ago Shuyin was the lover of a popular songstress and summoner named Lenne . They lived during the time Zanarkand was at war with Bevelle and ordered all summoners to the front lines , including Lenne . Shuyin wanted to end the war and save her by activating Vegnagun , Bevelle ' s machina weapon stored away in an underground chamber due to its destructive power and inability to tell friend from foe . Though captured when he penetrated the heart of the complex , Shuyin eventually reached Vegnagun and activated its cannon before Lenne appeared and pleaded with him to stop . Amazed to find Lenne standing before him , Shuyin embraced his love before the two were surrounded by soldiers and shot . Shuyin died not hearing Lenne ' s declaration of love for him . Shuyin ' s spirit was filled with such hatred and desire for vengeance he could not pass on to Farplane yet not manifest into a fiend and became a shadow of his former self . Within the Den of Woe , the pyreflies that continuously replayed his memories came to be imprinted with his hatred and began acting on their own . Rumors began circulating of a vengeful presence inhabiting the cave with reports of people seeing the illusion of a " gigantic machine " within ; this was really an illusion projected by Shuyin . A thousand years later , right before the Operation Mi ' ihen , Maester Wen Kinoc sent the Crimson Squad aspirants to the den for " a final training mission " . His true agenda was to investigate the rumored illusions and collect information on Vegnagun . Among the recruits were Baralai , Gippal , Nooj , and Paine . The recruits were driven mad and slaughtered each other due to exposure to Shuyin ' s grief and despair , while Shuyin ' s shadow possessed Nooj ' s body . Nooj and his friends escaped the cave and Kinoc ' s machinations , and arrived at one of Rin ' s travel agencies . Saying their final farewells and turning to depart , Shuyin ' s shadow took control of Nooj and shot his three friends in the back . Although they were not gravely wounded , it caused enmity and confusion among the companions , as they could not understand why " Nooj " would do such a thing . Shuyin used Nooj ' s eyes and ears in Spira , seeing the senseless violence and Yevon ' s corruption while concluding Spira had not changed and resolved to " fix " it . After lying latent within Nooj for two years after the onset of the Eternal Calm , the shadow manipulates him to infiltrate Bevelle Underground to steal Vegnagun . Nooj resists Shuyin ' s control to an extent , wishing instead to destroy the weapon . Nooj ' s conflicted emotions rouse Vegnagun and it flees and burrows into the Farplane . Baralai , Gippal , and Nooj meet in Vegnagun ' s empty lair to discuss the weapon ' s disappearance . Shuyin leaves Nooj ' s body and takes control of Baralai , whose rage over Nooj ' s assumed betrayal makes the possession easy . With Baralai ' s body , Shuyin departs to the Farplane to find Vegnagun with Nooj and Gippal in pursuit . Shuyin takes control of the aeons and summons fiends pour out of the temples ' Chambers of the Fayth . With the help of Yuna and the Gullwings , the temples are cleansed , but during a battle with the aeon Ixion , Yuna falls into the pit in Djose Temple and ends up in the Farplane Glen where she encounters Shuyin in Baralai ' s body . As Yuna possesses the Songstress dressphere comprised of Lenne ' s memories , Shuyin mistakes her for his lover . He reveals his plans to use Vegnagun ' s cannon to destroy Spira and end humanity ' s warring . Shuyin steps through a portal that would take him to Vegnagun , and Gippal and Nooj find Yuna , asking her to take care of things " topside " while they follow Shuyin through the portal to save Spira and free their friend . The portal disappears , leaving Yuna behind . Holding a concert to ease the tension throughout Spira , Yuna sings a song implied to have been composed by Lenne about her romance with Shuyin . The Songstress dressphere interferes with the sphere display broadcasting Lenne ' s final memories for the crowd , and Yuna learns of Lenne and Shuyin ' s existence as a shadow . The Gullwings investigate the Den of Woe , and are nearly driven to kill one another from the residing pyreflies ' influence as they are shown Shuyin ' s memories of how he tried to use Vegnagun before he and Lenne died . After YRP return to their senses , fighting illusions of Nooj , Gippal , and Baralai soon after , they conclude Shuyin ' s ancient feelings caused the Crimson Squad candidates ' deaths . The venture shows Paine the truth behind Nooj ' s actions two years ago , Rikku reminding her that Shuyin ' s shadow had transferred into Baralai ' s body . Yuna , Rikku , Paine , and Leblanc — with her cronies Ormi and Logos — follow Gippal and Nooj deep into the Farplane and help them defeat Shuyin . While Nooj ' s original plan is to graze Baralai enough for Shuyin to reenter him and then take his own life , Yuna proposes dismantling Vegnagun instead . Once Vegnagun is damaged beyond use , Shuyin leaves Baralai ' s body when Yuna tries to talk him into resting in peace by relaying Lenne ' s message . Gaining a physical form , Shuyin realizes Yuna is not Lenne and attacks her , Rikku , and Paine . After the Gullwings defeat the angered shadow , Lenne ' s spirit emerges from Yuna ' s dressphere and soothes Shuyin . As the shadow ' s anger and hatred dissipate , Lenne and Shuyin fade away to find peace in the Farplane . Gameplay . Shuyin ' s actions in battle are limited . He alternates regular attacks with special attacks based on Tidus ' s Swordplay Overdrives . His stance and attack movements are also identical to Tidus ' s . During Terror of Zanarkand , the equivalent of Tidus ' s Blitz Ace , Shuyin uses the World Champion , Wakka ' s Celestial Weapon from " Final Fantasy X " . Creation and development . Shuyin did not exist at the time " " , an extra cut scene included in the International version of " Final Fantasy X " , was originally made . The movie ' s scene depicting Shuyin ' s sphere recording originally featured Tidus . When " Eternal Calm " was released on a demo disc with " PlayStation Magazine " , the scene depicting Tidus in prison was changed to Shuyin ' s recording found in " Final Fantasy X - 2 " . Shuyin was created to initiate Yuna ' s search for Tidus as they look similar . Shuyin is based on an " " , a manifestation of the soul of a living person separately from their body , a concept present in the Japanese mythology . The " ikiryō " are said to be able " to possess another living person without the originator even being aware of it " . The spirits are not " tied to whomever they possess " , and " may freely move about bodies " . Voice . Like Tidus , Shuyin is voiced by James Arnold Taylor in English and Masakazu Morita in Japanese . Musical theme . " Shuyin ' s Theme " is the leitmotif of Shuyin . It is a haunted melody which subtly uses drums . It plays in the Den of Woe and in the Crimson Spheres that were recorded within the Den . Other appearances . " Final Fantasy Trading Card Game " . Shuyin appears depicted with his official artworks . His sole card is part of the Aqua " set .