Sword Art Online
Season 1, Episode 12: Yui's Heart
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Yulier, second in command, of the Liberation Army has approached Kirito and Asuna for help saving her friend and her guild.
All Episodes - Season 1
Episode 1
The World of Swords
Episode 2
Beater
Episode 3
The Red-Nosed Reindeer
Episode 4
The Black Swordsman
Episode 5
Murder in the Safe Zone
Episode 6
Illusionary Avenger
Episode 7
The Temperature of the Heart
Episode 8
The Sword Dance of Black and White
Episode 9
The Blue-Eyed Demon
Episode 10
Crimson Killing Intent
Episode 11
The Girl of Morning Dew
Episode 12
Yui's Heart
Episode 13
Edge of Hell's Abyss
Episode 14
The End of the World
Episode 15
Return
Episode 16
Land of the Fairies
Episode 17
Captive Queen
Episode 18
To the World Tree
Episode 19
The Lugru Corridor
Episode 20
General of the Blazing Flame
Episode 21
The Truth about Alfheim
Episode 22
Grand Quest
Episode 23
Bonds
Episode 24
Gilded Hero
Episode 25
The World Seed