Rei and Sei's mother who died while they were both a young age. At the beginning of the series, Rei doesn't really seem to have much of an attachment to her, saying that him and Sei only really relied on each other and always have.
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Rei and Sei's mother who died while they were both a young age. At the beginning of the series, Rei doesn't really seem to have much of an attachment to her, saying that him and Sei only really relied on each other and always have.
