Name: Oguni Genzai
Nicknames: Doc, Gramps
Friends: Kenshingumi, Oniwabanshuu
Enemies: Anyone who trashes the clinic.
First appearance: Tokyo Arc
Biography: Oguni has been a doctor for decades. Although not said in the manga, it's likely he delivered Kaoru and oversaw Kaoru's mother's last moments in the world. Oguni is wise and knows Japan's darker history, which he relates in tales told to Kaoru and Sanosuke. Oguni hires Megumi as his assistant, giving her the chance to put her past behind her and become a true doctor.
Personality: Cheerful and kind, also a bit of a lech.