Masaru Hanada
It’s later revealed that he is Min-san’s father. After one of the big arguments with her daughter, Ming Li, he left the ramen shop in her hands.
After a long time, he returned to visit Ming Li in disguise, which she doesn’t realize. She was really unhappy on how this strange customer’s behavior of only taking a sip of the ramen, which he ordered differently occasion, and he will pay full fee.