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Character:

An established selfish actress of great talent and self-professed star of the Hanagumi, Sumire is arrogant and conceited, perhaps because she was raised as a spoiled brat, with her father and grandfather being good-hearted yet very workaholic. Despite her attitude, she is skilled pilot and highly capable of wielding a naginata, and can sometimes be rather wise. She is a daughter born into the elite Kanzaki industrial clan, whose factory produced the Koubu. It is thought that she is named after the well-known Takarazuka member Sumire Haruno.

Source from Wikipeida