Ironmouse

About

Ironmouse (born January 11) is a Puerto Rican VTuber, singer, and Twitch streamer. Active since 2017, she was a founding member of the U.S.-based VTuber agency VShojo and was part of the organization from November 2020 until her departure in July 2025.
In her streaming activities, Ironmouse has been a prominent advocate for common variable immunodeficiency (CVID), an immune disorder for which she has received treatment; she has promoted plasma donation, and has held fundraisers and served as a spokesperson for the Immune Deficiency Foundation. In 2024, she became the most-subscribed Twitch streamer of all time, surpassing Kai Cenat’s first record during a September 2024 subathon, before being surpassed herself by Cenat during a November 2024 subathon.

Ironmouse originally planned to pursue a career as a coloratura soprano opera singer, but was diagnosed with common variable immunodeficiency (CVID), an immune disorder that has left her largely bedridden and isolated. It has also led to a lung infection called mycobacterium avium complex as she revealed in 2021. This required her to remain isolated from others, a situation which intensified in 2020 amid the onset of the COVID…