A/N: Some are canon, some are AR. Most are creepy and inappropriate since this is Seymour, after all. Also, I haven't played FFX in YEARS so I apologize for any mistakes!
Theories and Cantos and Avarice
01. Motion
She had danced countless times for the dead, and each one was unique, each one breaking her heart as she purified the soul, but he was the only one for whom she cried.
02. Cool
His touch had been icy even when he was alive, and now, she felt like she was being scorched by frosted flames.
03. Young
He first saw her as a child, during a celebration in honor of her father, and thought how beautiful she would grow up to be (how worthy).
04. Last
Smiling, he dots kisses down her navel, knowing that he will be her last.
05. Wrong
It's the world who is mistaken, and it is his duty to make them understand, force them to bend (it's therefore right that he start with her).
06. Gentle
She eyes his long, skeletal fingers in fear as they snake around her neck, but no pain comes as he embraces her.
07. One
Weighing the gravity of her decision, Yuna realizes how easily sacrilege calls to her, how the choice had solely been hers all along.
08. Thousand
He thinks this must be how reincarnation works: because they were destined for greatness, for love blown asunder and mangled—from a thousand and one years ago.
09. King
Even as she bows (her spine betraying her) she will never acknowledge him as her lord.
10. Learn
Love is not taught (is learned) and she will grow to love him back.
11. Blur
Past the flurry of pyreflies swirling around her feet, dashing between her sleeves, and gyrating through the strands of her windswept hair, he sees how vulnerable she truly is.
12. Wait
He will endure an eternity for her, until she too enters the Farplane.
13. Change
Full of pity, Seymour purchases a Chocobo doll for the girl and kindly tells her not to cry (that grief does not die, can merely abate).
14. Command
"Will you marry me," he breathes and the chains cinch into place around her waist.
15. Hold
Tentative, reverent, he brings her close, hoping to pour some of her sway (this curse) back into her.
16. Need
He doesn't want her; his desire goes far beyond that banal humanness—is something pure and sacred and irreversibly doomed.
17. Vision
In her dreams, she converses with his mother and everything becomes so clear and all the more horrific.
18. Attention
As she cries inconsolably over the blond boy, he pets her head and tries to soothe her with soft sighs and fumbling words, but she is adamant in her lament, spiteful against his devotion.
19. Soul
He imagines that each of Yuna's eyes guards a different entrance to her soul, and maybe if he is careful enough, surreptitious and cunning, he can unlock them both.
20. Picture
"Maester Seymour, who is this?" she gasps, pointing shakily to the burnt photo of his mother.
21. Fool
Even now she bows respectfully before him, quickly calculating for the opportunity to strike and seal him really dead.
22. Mad
Seething, he tosses her onto the bed and silkily divulges the Guado practice of marriage and marital rites.
23. Child
He was eighteen, freshly revived from exile and learning the grievances of youth all over again, and magnanimously, a little girl takes his hand and tells him not to be sad—for her father's sake.
24. Now
"My lady, there's no need to rush," for this present bond is everlasting.
25. Shadow
There are clouds skirting over hills, lush lapses in the hours, and her and him walking toward the dim horizon line (where at last, he can taste happiness).
26. Goodbye
Yuna sinks to her knees and lets the warm, crimson waters of Kilika nibble at her limbs; she dares not to think (to remember) how his tragic smile still perforates her stupid heart.
27. Hide
No matter, he will always find her.
28. Fortune
Fascinated, he watches her bless the merchants of Luca and wonders if she could save him too.
29. Safe
He will kill the world for her, so she will not feel misery, so she will finally be safe.
30. Ghost
"But y-you're dead!" Yuna screams just before his claws pierce her throat, gorging her on iron and rot.
31. Book
Tucking her feet under his ankles, she seeks for the familiar warmth and only when she is cocooned and content does she begin to read: chapter one.
32. Eye
She may not have the strange swirl distinctive to the Al Bheds, but they both know he knows what she is (and that he will keep her troublesome little secret, for now).
33. Never
"I will not love you!" she screams, not for all of Spira, for all the universe.
34. Sing
Lulu had the most beautiful voice, from Macalania to Gagazet, and on sad nights like this, Yuna would plead with her to chant his ghost away.
35. Sudden
Raw and powerful, his declaration guts her awful and brutal and totally unprepared for the redness seeping into her adulterous cheeks.
36. Stop
Witnessing the fusillade of hunger and venom (damned as veneration) burst from him, she cringes in fear because there will be no cessation, only a reprieve.
37. Time
In three hours they will wed, in three days they will depart, in three weeks she will be dead.
38. Wash
Her debauched abduction from the Al Bhed sanctuary resulted in a nasty gash down her shin and so, like a loving husband, he kneels to lick the wound.
39. Torn
With trembling fingers, she lines the veins on his face, wincing as she grazes his lips and desperately grips onto his shoulders—this is not betrayal.
40. History
He calls her "lady" as she calls him "lord," but history will not repeat.
41. Power
He towers over her, cowering before her.
42. Bother
He would've killed them nonetheless (she should've predicted that); Seymour couldn't bear any chance of competition.
43. God
"If Yevon had been honest then I would be too," he whispers into the delicate skin of her neck.
44. Wall
As she jumps from the high fortifications of St. Bevelle, he regrets how their destiny unfolded, how she could have loved him in perhaps another lifetime.
45. Naked
She is even more beautiful immobile, fresh and frozen like the silvery foliage of his forest-home, and determined, he slips deep inside her.
46. Drive
Crazed, he assures her that they will meet again because a love like theirs is transcendent, immortal (nauseous, Yuna struggles furiously against his taloned manacles).
47. Harm
It's not anguish or insanity that makes Seymour despise the boy—it's jealousy.
48. Precious
He won't allow another to become her Final Aeon, for no one can tear into her flesh and bleed her dry as gently as he will.
49. Hunger
He delights in her addressing him as Maester (revels in how it almost sounds like master).
50. Believe
Although dismayed, he admires her for leaping, plummeting and soaring with magnificent wings exploding underneath, and lies to himself that she did it for him.