When asked to list her personal heroes, Mosaku included her grandmother Anike Adisa, whom she described as having "taught me so many lessons"; actor Albert Finney, who was her inspiration for attending the RADA; her colleague and former instructor at RADA, William Gaskill; Paul Newman, whom she admired, not just for his acting, but also for his philanthropic efforts with Newman's Own; and Oprah Winfrey, who Mosaku considers "a superwoman".