|Spoiler Alert: This page contains spoilers. Read at your own risk.|
|Full Name||Mibu Yuuzou|
|Occupation||Chief of Foreign Affairs|
|Voiced By||Itaru Yamamoto (Anime)|
|Novel||Volume 2, Chapter 2|
|Anime||Episode 7, Enrollment Chapter VII|
Mibu Yuuzou (壬生 勇三) is Mibu Sayaka's father.
During his military career, he became very close to his companion-in-arms, Kazama Harunobu, who later would become a Major in the National Defense Force 101 Independent Magic-Equipped Battalion. After retiring from the military, Mibu transferred to Internal Affairs (Cabinet Agency of Data Supervision). He's currently Chief of Foreign Affairs, specifically international crime syndicates. Tatsuya was surprised of his affiliation with Kazama, but Mibu told him that he wouldn't say a word and just wanted to thank him for what he did for his daughter.
He provided some information about No Head Dragon.
Mibu Yuuzou's Work Profile
Cabinet Office Information Administration ->
Foreign Affairs Section ->
Foreign Affairs Third Division ->
Foreign Criminal Organizations Responsible Manager (International Crime Units) 
He is a Magician who uses Kenjutsu in live combat. His area of expertise lies in knife throwing.