The most sad moment´s in all Final Fantasy franchise:

Sacrifice your Aeons :/

Yuna: Summoning her beloved Aeons despite the heart break it causes.

Auron: "Haha sword go slice"

You know, I would kill Valefor last, because it’s probably just summon that Yuna connected to the most, and it’s the first one we got in the game

The pain on Yuna's face when she had to summon all of her aeons...I felt that pain. I HATED to kill them.

Valefor: "Strike me down."
Ifrit: "Extinguish me."
Ixion: "End it here."
Shiva: "Please... defeat me."
Bahamut: "Soon... eternal rest."
Yojimbo: "Take my life."
Anima: "Thus I atone."
Cindy: "Stop the suffering."
Sandy: "Don't cry."
Mindy: "Gotta say goodbye."
Me: "TT__TT"

Respect on that 99,999 health haha

I can't even begin to imagine just how hard this was for Yuna. The Aeons were just as much her partners and friends as her Guardians, and here she had to summon them one after another, just so that they could die at the hands of the party and deprive Yu Yevon of hosts to possess.

Yuna looked so pained because she didn't want to watch the aeons she's bonded with get slain, but everyone, including the aeons understood why it had to happen. Yu yevon had no vessels that it could possess and was in the end defeated.
And honestly, yu yevon being made to look like a tick was brilliant, as it was parasite on their world.

The aeons instructed Yuna to summon them, knowing their fate. It still didn't make it any easier.

Whoever busted their ass on the aeon animations must have demanded they be played in full by the player at the end.

Anyone else notice.. The Aeons kinda bow to Yuna as to wish her luck? Before they get possessed ...

The thing with Yu Yevon is that he is unconscious evil which is the most disturbing thing. Once a human summoner who became so indulged with the concept of summoning eventually abandoning all their humanity and only having one singular ambition. To summon no matter what it costs. Using the power of the dead who gave their souls to keep their homeland even in death he uses this font of energy to channel his power. He is not traditionally 'evil' as he has no conscious. All the pain and suffering of spira and its blissfully unaware of it all. Harrowing stuff

The look of Yuna each time she defeats a aeon is just... sad, horribly sad :'(

First time beating this game i was 10 years old. Now im 30 and man i wish i understood the storyline at 10. This game is soo much better than it was then, and it has been my fav game my entire life

The entire fight against all of Yuna's Aeons has to be the most gargantuan gut-punch in the history of JRPGs...

So heartwrecking, butchering the aeons you've been the whole game with.

Poor Yuna, crying her heart out as she summons aeon after aeon so they can kill them, and then there's Auron, grinning like a mad man on his aeon chopping block.

I like that moment of silence and Tidus scratching his head "oh so the final boss is a tick ok"

Symbolic the final boss is a tick - parasitical leech feeding off the never ending sorrow of Spira through religion, and in order to make his followers fall in line, relies on the powers of his created Aeons rather than on himself. In the end, when you strip away its' armor of Sin, and take away its ability to leech from the power of the Aeons, you have a being that can no more defend for itself as it could truly oppress you through strength.

Back then, it was the most painful battle I've ever had the displeasure  of doing. Bahamut was my favorite.