Sou Shirokane

He is the president of the Wahre Liebe Pharmaceutical Company, and Shinobu's father. [Spoiler] After his wife dies suddenly, Sou obtains a vial of mahou shoujo blood from Seiichi Fukumoto, his professional friend. Sou then begs Shinobu, the genius behind 40% of Wahre Liebe's drug patents, to resurrect her using the blood. [/Spoiler]