Yuuko is a mysterious girl who Hiro first meets in a church on Christmas night. She always appears generally out of nowhere, and disappears just as quickly in various places throughout the story to talk with Hiro or other characters and give them advice; interestingly, Miyako already knows her. She could be considered the key character throughout the ef story. She is a main character in the second series, part of which is focused on her connection to Himura. Yuuko is a kind-hearted person who hates being alone and puts on a brave face, even when upset or hurt.  

On Christmas Eve, Hiro Hirono's bike is stolen by a girl chasing a thief who stole her purse. He gives chase and finds her unconscious and his bike ruined. The girl, Miyako Miyamura, soon awakes and the two begin to talk. After making sure she is okay, they end up spending Christmas Eve together. Later, Hiro finds out Miyako attends the same school as him and they begin to spend more and more time together, Miyako developing affections for Hiro. Kei Shindou -- Hiro's childhood friend who has long held a crush on him -- begins to become jealous and a love triangle follows. 
The series also tells the story of Renji Asou. One day, he meets Chihiro Shindou, the twin sister of Kei Shindou, at an abandoned train station. Even though she's very shy, they get along pretty well and begin meeting at the same spot everyday. However, Renji finds out that Chihiro was in a car accident years ago and as a consequence she suffers from a disability: her memory lasts only 13 hours. Nevertheless, after learning that Chihiro's dream is to write a novel, Renji finally decides to help her fulfill her dream while also trying to make her overcome the difficulties imposed by her condition.

[Wiki (JP)](http://ja.wikipedia.org/wiki/中島裕美子)

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An American voice actress and singer who has worked for ADV Films, Funimation, and Seraphim Digital/Sentai Filmworks. She has been married to Dustin Faigen since April 19, 2008.

In a story set years in the past, Himura Yuu is a studious and diligent young man intent solely on maintaining his top academic position at Otowa Academy. One day, he meets a mysterious girl named Amamiya Yuuko, who, to his surprise, recognizes him. Memories of a distant childhood, memories rather left forgotten...meeting Yuuko again will force Yuu to confront the regrets and sorrows of their collective pasts and presents. 
In the present, Kuze Shuuichi may seem like a womanizer, but upon closer inspection, is a man who would rather be left alone. Hayama Mizuki, however, is not the type of girl who would let him be, especially after hearing the beautiful sounds of his violin performance. As Mizuki attempts to become closer to him, Kuze attempts to push her away&mdash;the tale of their budding relationship is darkened with undertones of an imminent tragedy.

Asou Renji comes back at the station with Chihiro, after the events of ef - a tale of melodies. They recollect various moments in this 'summary' of the first season of ef, with special new intermissions. 
(Source: Animeka)

The prologue for ef - a tale of memories, released on a separate DVD two months before the premiere of the TV series.

The story revolves around the protagonist Hirono Hiro, a poor high school boy who draws shoujo manga for his living. One cold Christmas night after meeting a very strange woman in church, his bike gets stolen by another strange girl. He runs after her and finds her collapsed on the street. Her name is Miyamura Miyako and her bag got stolen by a man on a motorbike. Soon after, they start hanging out together, enjoying highschool life and whatnot. Hiro&rsquo;s life is also strongly dictated by Shindou Kei, his childhood friend.

Yuuko Amamiya