Height 158 cm Junichi's younger sister and who playfully calls her brother, "Nii-ni." She tends to be jealous when her brother is with another girl. She likes meat buns.

Spoiler

Her extra ending in the game. Miya/Imouto End: Happens if you raise certain flags with her and if you fail to get with any girls. On Christmas, she finds a kitten. Junichi goes with her to find her mommy cat. He saves the mom cat from being run over. Miya and Junichi see the kitten and mom cat playfully bite each other (amagami!). Tachibana explains amagami is a form of affection. Miya bites Junichi to show how much she loves her 'nii-nii'.