Koyori is Mana's little sister who, at the beginning of the story, is staying in the same hospital as Aono, but is soon discharged. Whenever she calls Mana by her given name instead of referring to her as her big sister, Mana strikes her head. Koyori tries to keep Aono company whenever she can and they become good friends over the time Koyori spends in the hospital. Aono also teaches her how to make origami. Koyori is very polite to others even when not required to do so.  (Source: Wikipedia)

Sola's story revolves around Yorito Morimiya, the main protagonist, who is a young boy attending high school. He loves taking pictures of the sky at any time of day and any time of the year. One day, Yorito decides to take a picture of the sunrise overlooking the bay, but is deterred when he meets a strange girl trying to force a vending machine that stole her money to give her what she tried to buy&mdash;a can of tomato juice. Yorito helps her with forcing the machine while attempting to strike up conversation with her, despite it being four in the morning. Yorito tells her why he is here, but by the time he has forced the can out of the machine, the girl has mysteriously vanished. 
(Source: Wikipedia)

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Ai Shimizu is a Japanese voice actress and professional wrestler. She has a career as a singer, signed to Lantis. She has released 14 singles (including joint and character singles) and four albums. She covered Yumi Matsutoya's "Toki o Kakeru Shōjo" as the B-side of her first single "Angel Fish" in 2003. She is known to have a close relationship with Mai Nakahara, having collaborated in eight anime where most of the characters they voiced in together had close connections: DearS, Kage Kara Mamoru!, My-HiME, My-Otome, My-Otome Zwei, Please Twins!, Sola, Strawberry Panic! and the Lucky Star drama CD. Shimizu has worked sporadic professional wrestling matches since December 2013

Episode 1: A Different Route 
Episode 2: Towards the Dawning Sky

Yorito Morimiya loves taking pictures of the sky so much that one day, he wakes up at 4 am to take pictures of the sunrise overlooking the bay. However, he is deterred when he meets a strange girl trying to force a vending machine that stole her money. Yorito helps her with forcing the machine but when the machine finally vends, the girl has mysteriouslly vanished. 
 
(Source: Anime News Network)

Koyori Ishizuki