Inamoto Hatsune

The wife/mother/daughter/sister of the protagonist (depending on what cheats are or aren't used). Can also be a catgirl, cowgirl, pirate or a combination of the three depending on what cheats are activated.

Spoiler

If she is Minorou's sister, they lost their virginities together long time ago when Hatsune had her two arms broken and when they were teenagers.