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Risa Koizumi (小泉リサ)Birthday: August 3
Blood type: O
Height: 172 cm (5 ft 7 in)
Weight: 50 Kg
The protagonist, Risa Koizumi is not your average Japanese high school student. Standing 172 centimetres (5 ft 8 in), Risa's height is well above that of most Japanese girls her age (the average height for a female is 160 cm (5 ft 3 in)) Ironically, her surname means 'little spring'. She and other characters compare her to a giraffe. Risa can be impulsive and strong-willed at times, and is rarely willing to display her softer side. She had a crush on Suzuki before he started dating Chiharu. In the beginning of the series, Risa is 170 cm (5 ft 7 in) but she gains 2 cm (0.79 in) in height to become 172 cm (5 ft 8 in).