[Kazuki's](https://anilist.co/character/163252/) younger sister. The eldest daughter of the Shindou family.

The hottest battle is about to begin!<br>
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While attending Tensei Academy, Hiiro Ryuugasaki ends up acquiring a mysterious smartphone. It comes installed with the popular card game, Shadowverse! Meeting new rivals, facing major tournaments, forging bonds with friends... Shadowverse leads Hiiro to all sorts of new experiences, all that serve to "evolve" him...<br>
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(Source: Crunchyroll)

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Shii Shindou