As the oldest member of the Kazama Family, Momoyo is seen as the older sister of the group. She also has a brother-sister type of relationship with Yamato. As such, she'll occasionally pick on him, while also go out of her way to look out for him.
Momoyo is considered to be the strongest fighter in the world, second only to her grandfather. She is friends and rivals with Kuki Ageha from KimiAru.
(Source: Wikipedia)
