Shigen resembles Seigen Amawaka with the prominent Amawaka yellow hair streak, but the only difference is that he was older with heavy wrinkles.
Shigen had a distorted personality.
He was quite ruthless, as he showed no remorse in executing exorcists as the head of Ritsu, even wanted to kill more innocent people.
He can be very petty, as he was jealous of his son Seigen being chosen by Byakko, rather than being proud of this achievement.
- Enchanted Gears: Being an Exorcist, Shigen is able to use Enchanted Gears to help him combat Impurities when fighting in Magano.
- Kokuren Shuko (黒煉手甲, Kokuren Shukō?, lit. "Forged Black Gauntlets"): A common skill among Amawaka House. By using the Evil Claws Charm (邪爪顕符, Jasō Genpu?), the user dons a pair of black gauntlets with long claws. It has the ten percent of the Byakuren Koho power.
- Tobizume (飛爪, Tobizume?): A long-range attack where the user shoots the claws out of their gauntlets.