Rinko Nikaido

This character is a student at Shirabara Private High School, Class 2-A, and is the adopted daughter of Mari Nikaidō. While originally appearing later in the manga, she is portrayed as a sweet high school girl who enjoys wrestling in the anime, first appearing during a specific fight. She shares a close bond with her best friends, Keiko and Tamaki, though her focus is increasingly shifting towards Jacqueline, with occasional interests in Jade or Chaos, cementing her role as Mantaro's girlfriend.