As he is never seen in game, it is unknown what he looks like.
Upon listening to Kokona's conversation on the rooftop, the player can infer that she is "abused" by her drunk father when he comes into her room. When asking for more information in order to befriend her, Kokona states that he does not abuse her when he comes into her room at night, but instead cries over his debt problems.
After his wife died, Kokona's father started to drink. As his family had lost a lot of money, he took out loans to pay for Kokona's tuition fees. He borrowed money from very shady people from a company called "Ronshaku Loans", who scammed him through high interest rates and continually extorted him into paying a lot. Kokona tries to help her father get money and out of debt as fast as she can, through compensated dating and selling panties.
After Musume Ronshaku is released from captivity, Kokona's father will be no longer in debt. Kokona will be willing to visit Yandere-chan for a favor after this.
Kokona's father is a caring individual who will go to great lengths to take care of his family. He became mentally weak after his wife died, as he will drink and cry a lot. After he's freed from debt, he becomes much happier.
- Kokona's father was first mentioned in the May 15th, 2015 Build. His personality was fleshed out more in the June 1st, 2016 Build.