Miho Aihara (相原美穂, Aihara Miho) is Yuki Aihara's sister-in-law.
Miho married Yuki's brother and runs a flower shop with him in Yokohama. She is pregnant with their first child. Yuki lives with them, forcing Miho to take a motherly role. Unfortunately, the two have a strained relationship. Yuki is angry at Miho and her brother because she feels that they threw their lives away to get married. Despite this, Miho tries to do the best she can with Yuki.
- Contrary to some early speculation, Miho is not Mistral.