Madeline Kimie Tyau was born on September 5, 2002 in Honolulu, HI to Brian and Kim Tyau. She has two younger sisters, Kira-Lei and Joie and two dogs named Maka and Kona. Currently, Madeline is an honor student at Moanalua High School and she will graduate from high school in 2021.

Madeline always loved climbing and cartwheeling everywhere as a child, so her parents enrolled her into a parent/tot class when she was three years old at Kokokahi Gymnastics in Kaneohe, HI. Madeline trained at Kokokahi Gymnastics until 2013. Following her level 9 season in 2013, Madeline moved to Hawaiian Island Twisters in Honolulu, HI and has been there since.

As a first-year level 10 gymnast in 2015 at the age of 13, Madeline finished fourth in the all-around, first on balance beam and second on vault and floor exercise at the State Championships. At the Region 2 Championships, she placed second in the all-around with a 37.050, first on vault and second on uneven bars. She qualified to the Junior Olympic Nationals in Des Moines, IA. Madeline was unable to compete most of the 2016 season due to an injury and competed as a specialist at the State Championships, earning bronze medals on vault and balance beam. Madeline came back strong in 2017 and she finished first in the all-around with a 37.425 and first on vault, uneven bars and floor exercise at the State Championships. She placed second in the all-around and first on floor exercise at the Region 2 Championships. Madeline qualified to the Junior Olympic Nationals for the second time in Indianapolis, IN.

In 2018, Madeline placed fourth in the all-around and fourth on uneven bars at the Region 2 Championships. She qualified to the Junior Olympic Nationals in Cincinnati, OH. Madeline earned gold medals on vault, balance beam and in the all-around with a 37.475 at the 2019 State Championships. She qualified to the 2019 Junior Olympic Nationals after finishing fourth in the all-around and second on uneven bars and balance beam at the Region 2 Championships. At the Nationals in Indianapolis, IN, Madeline placed fourth on uneven bars and 12th on balance beam.

Madeline trains 20 hours per week at Hawaiian Island Twisters in Honolulu, HI under coaches Joe Rapp, Christine Dorrepaal and Joel Shugart. Her long-term goal is to earn a gymnastics scholarship to compete for a Division I college gymnastics team.