The Rumble Fish 2/Hikari - Mizuumi Wiki

The 16-year old sister of Kaya, Hikari Mutsuki (睦月 ヒカリ, Mutsuki Hikari) is one of the 2 daughters of the late-and-famed Seijuurou Mutsuki who was killed by Greed in a fierce battle. As a result, their father's dojo remained closed and Hikari via the decisions and care from their other relatives, forced to attend a different school than her sister Kaya. While Hikari is rather more positive-thinking and surrounded by friends moreso than Kaya, her drive to inherit the Mutsuki-Style seems to be stronger than the latter.

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