Ironmouse

Who is Ironmouse?

Ironmouse is a Puerto Rican VTuber, singer and livestreamer who began publishing as a virtual persona in 2017. She built a large English-language audience on Twitch and YouTube with a mix of music, gameplay and just-chatting streams, and was a founding member of the U.S.-based VTuber agency VShojo from November 2020 until July 2025.

Across her career Ironmouse has combined performance and advocacy, using high-profile subathon events and charity drives to raise funds for the Immune Deficiency Foundation. She has also been recognized in mainstream awards, including Content Creator of the Year at The Game Awards 2023 and Best VTuber at The Streamer Awards.

Visual style and persona

Ironmouse presents an anime-inspired demon queen character with bubblegum pink hair, small horns and a playful, theatrical aesthetic. The avatar blends cute and camp elements—frilly outfits, dramatic gestures and bright color palettes—that read strongly in clips, thumbnails and short-form video.

Her on-camera voice and performance lean toward high, expressive vocals; she often showcases singing talent during streams and music releases, which reinforces the idol and vocalist aspects of the character. Ironmouse’s visuals are designed to be instantly identifiable across platform formats from long-form streams to short videos.

Content Type & Format

Ironmouse’s core content is live streaming on Twitch: long sessions include gameplay, variety chat, music segments and special marathon subathons. These livestreams are the primary place where Ironmouse’s personality comes through, with extended audience interaction, singalongs and community-driven events.

She also publishes VOD highlights and music videos to YouTube and posts short clips and edits to platforms such as TikTok. Ironmouse’s content mixes edited clips, live performance videos and short-form comedy or music snippets to reach viewers who do not catch the live streams.

Music and recorded releases are an important strand of Ironmouse’s output: she performs covers, original tracks, and collaborative singles while promoting releases across social platforms. Ironmouse’s content routinely combines her theatrical singing, playful persona and community-driven formats like Q&A, challenges and charity streams to form a recognizable content loop across Twitch, YouTube and short-form platforms.

Ironmouse Collaborations and Campaigns

Immune Deficiency Foundation Subathon: Immune Deficiency Foundation x Ironmouse — In 2023 Ironmouse ran a multiweek charity subathon that donated a large share of Twitch subscriptions, bits and merchandise proceeds to the Immune Deficiency Foundation. The event was presented as both a fundraising drive and a community milestone, pairing long-form livestream content with fundraising overlays, music performances and highlight clips for social distribution. Tiltify IDF Fundraiser: Ironmouse x Immune Deficiency Foundation — Following later developments in 2025, Ironmouse launched a dedicated Tiltify campaign to raise funds for the same charity, using livestreams and social appeals to gather rapid donations from her community and partner creators. The fundraiser combined live video, social updates and donor recognition mechanics to drive engagement and visibility. 1-800: bbno$ x Ironmouse — In June 2025 Ironmouse was featured on a single with rapper bbno$, credited on official music platforms and supported with performance clips and short-form video. The collaboration presented Ironmouse in a mainstream music context and used music platforms, music video excerpts and social content to reach audiences beyond the core VTuber community.