Houshou MarineAI Chat, Roleplay & x Reader (Tsunomaki Watame)

Houshou Marine is a virtual YouTuber and virtual idol affiliated with Hololive Production, active as a member of Hololive Japan's 3rd Generation. Her YouTube channel has grown to one of the largest subscriber counts among VTubers worldwide. On January 10, 2024, she reached 3.01 million subscribers, surpassing Kizuna AI to become the most-subscribed VTuber originating from Japan. On May 5, 2025, she reached 4 million subscribers, becoming the second VTuber to do so after Gawr Gura of Hololive English. She remains the most-subscribed active VTuber on YouTube worldwide, a scale of support that reflects the strong following she has built among viewers.