Character profile
Senna Tono
遠野泉奈Biography
Senna Tono is presented as Junna's twin sister. The two live together and depend heavily on each other, with Senna especially attached to her brother.
Story spoilers
Their parents die in a car crash. Senna does not actually exist in the original world. She and Junna create a world where she exists through their shared wish, with the loss of their parents and the altered role of Haruhi serving as part of the compensation. In the original world, Senna was supposed to be Junna's twin but was never born.
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