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Serina
Serina is a maid who works for the protagonist of the anime series "How a Realist Hero Rebuilt the Kingdom." She is a stoic and mischievous young woman with blue hair and a headband. She is fiercely loyal to her master and will do anything to protect him, even if it means putting herself in danger. Serina is a complex and well-developed character who is sure to capture the hearts of fans of the series.