Bussura

Bussura is a slime martial artist who devoted a full three hundred years to rigorous training before finally achieving a humanoid form, going on to establish her own school known as the Bussura-style Slime Fist. While she harbors an intense fixation on growing stronger, her personality is remarkably grounded in worldly, money-driven concerns. After suffering defeat in a martial arts tournament, she took the high-ranking demon Beelzebub as her master—yet she has shown far greater enthusiasm for learning tax-saving strategies and wealth-building methods than for any further combat training.