|Final Fantasy X Boss|
|Sensor||Casts ice, lightning, water, and fire in succession.|
|Common Steal||Turbo Ether|
|Common Drop||Blk Magic Sphere|
|Rare Drop||Special Sphere|
|Weapon Drop||Piercing, Silencestrike|
|Abilities||Shell, Fira, Thundara, Watera, Blizzara, Firaga, Thundaga, Waterga, Blizzaga, Multi-Fira, Multi-Thundara, Multi-Watera, Multi-Blizzara|
|Resistant to||Poison (40), Magic Break (50), Zanmato (Lv. 4)|
|Immune to||Silence, Sleep, Darkness, Petrification, Zombie, Power Break, Threaten, Death, Provoke, Doom, Gravity, Delay, Eject|
- “Ah, of course. 'Protect the summoner even at the cost of one's life'. The Code of the Guardian. How admirable. Well, if you're offering your lives, I will have to take them.”
- See also: Seymour Guado
- See also: Anima (Final Fantasy X Boss)
Seymour is flanked by two of his Guado Guardians; their first action is to cast Protect on themselves, while Seymour casts Shell on himself. The Guards will cover Seymour from physical attacks, and due to their Protect status the party cannot inflict much damage on them with physical attacks. They cannot cover magic, but Seymour will not take much damage from magic due to his Shell status. The Guards will use Hi-Potions whenever they are hit with a physical attack. They will also throw Confuse-inducing Shremedies at the party.
After his HP drops to 3,000, Seymour will summon his aeon, Anima. After Anima is defeated, Seymour will have returned to full health and his Magic power will be raised. Seymour will vary his spells which he casts twice in one turn. He will use Blizzaga, Thundaga, Waterga and Firaga on any aeons still standing, but may heal the aeon if it absorbs the element of Seymour's spell.
Using Ixion, Aerospark might counteract Seymour's Shell status. The Guards will use Hi-Potions whenever they are hit with a physical attack, but using Rikku to steal these will prevent this action. Stone Breath from Kimahri will kill them instantly.