Mayuri Shiina is a sweet and gentle character from the anime series Steins;Gate. As a close childhood friend of the protagonist Rintarou Okabe, Mayuri plays a crucial supporting role in the story. Known for her innocent demeanor and love for cosplay, she is the heart of the Future Gadget Laboratory, often lightening the mood with her cheerful and carefree attitude. Despite her apparent simplicity, her presence is pivotal to the emotional depth of the series, as her safety becomes a key motivation for the protagonist's actions.