Originally Posted by Big D
Yep, Seymour was a gifted Summoner - but he joined the Warrior Monks instead of pursuing that path... but it's all explained in the game. Anima was intended to be his Final Aeon, since his mother wanted him to gain the respect of the people by defeating Sin, but Seymour had other ideas - mainly as a result of the anguish at losing his mother, and the intoxicating lure of power offered by his Aeon.[q=BG-57]Based on what we see of each Fayth and their corresponding Aeons, the Aeons are summoned embodiments of each Fayth.
The physical resemblance is more apperent with Jecht, but less so with Bahamut, where the wheel logo on the Fayth is the only evidence of a connection.[/q]I reckon that Aeons can also embody the non-physical characteristics of the Fayth. Like the Fayth's emotions translate into the Aeon's characteristics... for example, Seymour's mother was a sad and lonely woman; she was trapped or bound by the sense of responsibility and guilt she felt toward her son. The Aeon Anima is also trapped in darkness, with a heavy chain around its neck and its hands tied together. Jecht, on the other hand, was a fiery and hairy man who used a sword... three characteristics evident in his Final Aeon. The Fayth of Bahamut was only a boy, but he may have been wise, brave and noble - as suggested by the knowledge he imparts to Tidus, and the fact that he willingly sacrificed his life to preserve the memory of Zanarkand. Qualities like those could give rise to the powerful dragon Aeon, Bahamut.