Yaku Yakuzen

Yakuzen Yaku is a main character and is Rentarou's 16th girlfriend. She is the grandmother of Yakuzen Kusuri. Yaku has a similar appearance to her granddaughter, Kusuri, but due to the strength of her granddaughter's immortality drug prototype, her appearance is not reverted by the neutralization drug. She has turquoise eyes and long, straight red hair. However, her bangs are much more well-kept, and she has a smaller ahoge. She wears a traditional kimono and wooden sandals. When Yaku was young and still an active military medic, she wore a light-colored shirt, white medical coat, light-color...