Mamoru is Riku's father.
Mamoru, known as Mori to his friends, is married to Akiko Miyano. They have one child, a son named Riku. Mamoru works as a head chef at the restaurant "Wayfarer" that he started with his friends, Yoko and Tai. Mamoru is a gentle giant.
He is very loud and excited person who loves to compete with his best friend, Yoko. This competitive streak has not only been going on for years, but it has rubbed off on his son.
He is present in 1 chapter.
I pictured him with a voice like Micah Solusod, but you can add your own spin on it if you want.