Vivian McCarthy

Vivian McCarthy is one of the most compelling figures in MOUSE: P.I. For Hire (2026), developed by Fumi Games. A mouse actress who once performed under the Tinsel Bros. studio banner, Vivian walked away from that world before the events of the game, driven by a refusal to compromise her artistic values. When her close friend and fellow actress Betty Lynch turns up dead, and the police dismiss it as natural causes, Vivian hires detective Jack Pepper to dig deeper. She carries herself with a sharp, sultry confidence that masks a complicated moral core, as the story slowly reveals her own entanglement in Betty’s fate. Her arc lands somewhere between grieving friend and calculating schemer, making her one of the game’s most unpredictable presences.

English Voice: Rhiannon Moushall

Vivian is voiced in English by Rhiannon Moushall, an Australian actor based in the UK, trained in musical theatre at the Queensland Conservatory of Music. She transitioned into full-time voice acting in 2020 and won the OVA VO Artist of the Year (Female) award in 2025. Her most recognized roles include Cerydra in Honkai: Star Rail and characters in Warhammer 40,000: Rogue Trader and Warframe.