A Virtual YouTuber and 3rd batch member of hololive, also called "Hololive Fantasy". While she claims to be a pirate ship captain, to the point of being referred as "船長" (senchou), she can more appropriately be described as a cosplayer or a wannabe. Her personal emoji is 🏴☠️ ("Pirate Flag" or "Jolly Roger")
Marine has heterochromia, with her left eye being red and her right eye, usually concealed behind an eyepatch, being yellow. Despite appearing mature and elegant, she is prone to randomly losing control of her inner otaku and going crazy.