| Yakushi zen | |
|---|---|
 | |
| Vital statistics | |
| romanji name | zen |
| kanji name | 鴆 |
| english name | medical |
| race | yokai |
| birth date | august 12 |
| age | no information |
| gender | male |
| height | 177 cm |
| weight | 64 kg |
| eyes | red |
| hair | gray
black |
| status | |
| affiliation | no information |
| occupation | no information |
| relatives | rikuo nura (master)
hebidayu (slave) |
| first appearance | |
| manga debut | Act 3 |
| anime debut | Episode 2 |
| voices | |
| Seiyū | Tomokazu Sugita |
yakushi zen is rikuo's trusted person for rikuo.