Sōichirō Shidō (紫堂 総一郎 Shidō Sōichirō ), better known as Nachi (那智), is a character who appeared only in the manga.
Soichiro changed his name to Nachi after getting plastic surgery because he was tired of being called "Cheesy" by Madoka. (Vol. 6 - Bonus Story) He was knifed shortly after the incident when Ms. Oshige opened one of Mitsuki's birthday presents. (Vol. 5 - Ch. 21) In the seventh volume, Nachi and Madoka can be seen on a balcony watching Mitsuki's performance. He is also a servant of a prince.
- Whenever he appeared, almost all the fan letters and emails to the Ribon website went to were for Nachi.
- Pure Love, Songs of Love (First appearance)
- Absolute Territory—Midnight Revolution
- Not Even God Can Stop the Moon
- If My Wishes Will Never Come True, I Will...
- To My One and Only Eichi