YEAR 40: BGS 28: February 14, Shishito Nanako is born.
YEAR 48: BGS 20: October: Nanako murders a teacher because he jokingly tells her it's a way to graduate early. She graduates early, the same day as Sephiroth.
YEAR 49: BGS 19: November: Nanako is field-promoted to Chuunin the same time as Sephiroth.
YEAR 51: BGS 17: January: Nanako is inducted into Kiri's T&I Department.
YEAR 52: BGS 16: July: Nanako reaches Jounin rank the same month as Sephiroth. The details are classified.
YEAR 59: BGS 9: February: Nanako is appointed Head of T&I.
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YEAR 48: BGS 20: October: Nanako murders a teacher because he jokingly tells her it's a way to graduate early. She graduates early, the same day as Sephiroth.
YEAR 49: BGS 19: November: Nanako is field-promoted to Chuunin the same time as Sephiroth.
YEAR 51: BGS 17: January: Nanako is inducted into Kiri's T&I Department.
YEAR 52: BGS 16: July: Nanako reaches Jounin rank the same month as Sephiroth. The details are classified.
YEAR 59: BGS 9: February: Nanako is appointed Head of T&I.