Masumi Ageo is a relatively new 23-year-old teacher in charge of the Tulip class. She appears nervous about everything and suffers panic attacks when confronted with a large group of children (a daily occurrence for a kindergarten teacher). However, when Shin-chan removes her glasses, her vision blurs and her personality shifts; she becomes highly aggressive and fearless, as demonstrated in her debut in episode 281-2, "The New Teacher Acts Weird". She has a fixation on Kuroiso, though the motivation behind it differs between the manga and the anime, shifting from admiration to romance. Over the course of the series, she grows more "extroverted," though she never fully embodies what that term implies.
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