Episode 12: “Yui's Heart”
- 12 of 25
- September 22, 2012
- 23 min
- Aired
Contents
| Series | Sword Art Online |
|---|---|
| Episode | 12 of 25 |
| Japanese | ユイの心 |
| Original air date | September 22, 2012 |
| Episode length | 23 min |
| Studio | A-1 Pictures |
| Previous episode | Episode 11: “The Girl of Morning Dew” |
| Next episode | Episode 13: “Edge of Hell's Abyss” |
| Streaming | Crunchyroll, Netflix, Hulu |
“Yui's Heart” is episode 12 of the anime Sword Art Online. It first aired on September 22, 2012.
Summary
The summary below describes what happens in this episode.
An Army member explains that Kibaou abused the organization’s authority and trapped its leader, Thinker, in a secret dungeon on the first floor. Kazuto and Asuna reluctantly accompany the Army member to rescue him.
Characters in this episode
Music in this episode
- OP 1“crossing field” — LiSAAnimeThemes
- ED 1“Yume Sekai” — Haruka TomatsuAnimeThemes
Where to watch
Streaming services that list Sword Art Online. What you can watch depends on your country. Acino does not host any video; each link leads to the service's own page.
Episode guide
All 25 episodes → · 22 of 25 episodes have a summary
About the series
This anime series is set in a virtual reality game where players are trapped and must survive. The story follows Kirito and his interactions with fellow players, including Asuna Yuuki, as they try to escape the game. What makes it distinctive is the high stakes, where death in the game means death in real life.
Read the article →References
- “Sword Art Online”. Kitsu. Retrieved October 22, 2026.
- “Sword Art Online”. MyAnimeList. Retrieved October 27, 2026.
- “Sword Art Online”. AnimeThemes. Retrieved October 23, 2026.
Episode titles and air dates come from Kitsu. The summary is written by Acino with AI assistance and checked so that it does not copy other sites.