Houshou Marine is a Japanese virtual YouTuber and pirate captain affiliated with Hololive, known for her playful personality, pirate theme, and distinctive greeting. Ahoy became her trademark opening line during streams, instantly identifying her to fans and helping build her community around pirate jokes, songs, and lively chat interaction. Short clips of the greeting spread through fan edits, memes, and soundboards because they are instantly recognizable even out of context. The phrase remains popular as a quick, friendly way to signal a Hololive reference or start content with energy.