Goutoku Sakurakouji

The head and highly respected man of the yakuza that is said to fight the strong and help the weak and nicknamed "The Raging Dragon of the East". However he is revealed to be a weak ill man who gets nosebleeds when he gets overexcited, but loves his daughter dearly and only wishes for her to be happy and untainted by this world. Yet when he met Rei he could easily see the killer intent in his eyes and warned him that if anything were to happen to his daughter, he would be next.