These characters have no currently known proper names.
Rokka's family consists of her parents and her grandparents. They live in Gifu.
Background[]
Rokka's father was initially against her decision to study in Tokyo. Eventually, he accepted her decision when Rokka was able to get a scholarship and do household chores on her own. According to her grandfather, Rokka's stubbornness and strong-willed personality might have come from her father.
Meanwhile, her mother and grandmother supported her decision to study in Tokyo and taught Rokka on how to cook and how to do household chores so she can get her father's approval to study in Tokyo.
Rokka's grandfather adores his granddaughter and also supports her decision. He even accompanied her when she went to buy her guitar.