Marisa Hyoudou is a supporting character in Welcome to the Ballroom. She is the Russian-born wife of Hideo Hyoudou and the mother of Kiyoharu Hyoudou. A former professional Standard dance champion, she has built a reputation as a celebrity instructor who frequently appears on television. She owns and operates her own dance academy, where she serves as a teacher and coach. Marisa is the original instructor of Shizuku Hanaoka and later takes on Tatara Fujita and Chinatsu Hiyama as students when they form a partnership. She also appears as a judge at competitive dance events.

In personality, Marisa is known for her confidence, decisiveness, and intense competitive drive. She carries herself with a commanding presence on and off the dance floor and is unafraid to speak directly and assertively. Her passion for ballroom dancing is matched by a strong dedication to technical precision and continuous improvement. Although she can come across as strict or blunt with her students, her motivation is to push them toward their full potential. She values hard work, discipline, and the pursuit of excellence, traits she applies both to her own dancing and to her teaching.

Marisa holds deep connections with several key characters. As Kiyoharu's mother, she has trained him from a young age, shaping him into an elite dancer known for his elegant and traditional style. She was also Shizuku's teacher before Shizuku partnered with Kiyoharu, and her instruction laid the groundwork for Shizuku's refined technique. Her relationship with Tatara evolves from initial skepticism to active mentorship after she recognizes his natural talent and determination. As a coach, she becomes instrumental in his growth, challenging him to refine his fundamentals and push past his limits.

Within the larger narrative, Marisa represents the highest tier of professional expertise in the competitive dance world. Her studio serves as a rival and complement to the Ogasawara Dance Studio, and her presence raises the stakes for the younger protagonists. Her experience as a former champion and her role as a judge and commentator provide valuable perspective on the standards and politics of competitive ballroom dancing. In terms of development, Marisa does not undergo a dramatic personal transformation but instead remains a consistent figure of authority and skill. Her arc is defined by her gradual acceptance of unconventional talent and her willingness to invest in dancers outside her immediate circle, particularly Tatara. Her notable abilities include mastery of Standard dance forms, deep knowledge of technique and choreography, and the capacity to diagnose and correct a dancer's weaknesses with precision. Her reputation and connections in the dance community make her a formidable presence both as a competitor and as a teacher.