Юмэитиро Сирасаги

Tomu's father, an unparalleled con artist and notorious swindler who taught Tomu all he knew. However, Tomu claims that his father isn't the type to swindle the innocent. It is later revealed that Yumeichirou has somehow been captured by Abidani and is being held at the academy. It is implied Yumeichirou was investigating something suspicious about the academy.