He left for Mexico when Kaoru was young, and studied the art of the Luchador after experiencing a losing streak that could have cost him his career. His teacher was severely injured in what is implied to be his final match. The Masked Wonder was given his teacher's mask, which in true lucha spirit, he never removes (except when taking a shower). Since then, Kaoru has forgotten what her father's face looks like. There is no photograph in their family album that shows what his real face looks like either, mirroring Miss Bellum's running gag. After he wins the match against Panda Face McGrath, Kaoru finally got to see her father's face for the first time since before he left for Mexico, which is reportedly 'very handsome'.
Kaoru Matsubara (Daughter), Tokio Matsubara (Husband), Shou Matsubara, Dai Matsubara (Sons)
She is a very good cook and is exceptionally gentle in contrast to her husband and kids. She also likes to smile a lot.
Kaoru ask her mother why his dad didn't remove the mask in his face. Mitsuko told her that is a reseamble of a promiese of his father friend, Mask Do Mexico, he promiese to take good care of his mask. By leaving them just to wrestling to mexico, Mitsuko is the only one who take good care of her children.
She resembles Buttercup from PPG, When Buttercup became a mother.
Kaoru Matsubara (Sister), Tokio Matsubara (Father), Dai Matsubara (Brother), Mitsuko Matsubara (Mother)