hosoe junko
Former female jockey. She was the first female jockey of the JRA, graduating the JRA Horse Racing School alongside Fukunaga Yuuichi and Wada Ryuji. Unfortunately she was forced in to an early retirement in 2001 due to her injuries, eventually becoming a racehorse writer and pundit for several racehorse related publications and TV shows.
In the context of Umamusume, she has appeared as the commentator for races in both the anime and the game, as well as a bartender in Umayuru (a reference to her alter ego on YouTube/real life stint).