Osana Najimi (voiced by Brittany Lauda) is the first rival the player meets when they start the game Yandere Simulator. She serves as the game's tutorial and a prickly one at that. Not that you'd know by looking at her style, however. She has a sweet sense of fashion that makes for an excellent cosplay.

Since the game takes place at school, most of Osana's outfit is a standard school uniform. A white blouse with a blue sailor collar and red necktie, a blue pleated skirt, and black slip on shoes. Her personal style comes in with her long red hair pulled back in pigtails by red scrunches and decorated with a red ribbon bow, and with her pink polka dot socks.

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