Mari Tan, known as まりたん in Japanese, is the main character of the series Magical Marine Pixel Maritan. She is a magical girl styled as a marine, serving as both a parody and a mascot for military English language learning. Mari Tan is energetic, mischievous, and often uses military slang in humorous ways. Her role is to teach English phrases—often with a comedic or satirical twist—while engaging in lighthearted adventures with her friends.