 A promising and confident official, he is known for his willingness to sacrifice others to achieve his goals, much to Shūrei's displeasure.However, Shūrei looks to him as a senior during her time as a censorate official and regards him as a rival in hopes of winning his approval through her own efforts, a relationship that Seiga reluctantly reciprocates.Seiga is later responsible for dealing with accusations that lead to Reishin and Kōyū losing their positions in the Department of Civil Administration.