Shungoku is usually a kind person at heart, who would take in a lost puppy, and help people in need. However, when with someone he hates, he wants to rip their guts out and mount them on his trophy room wall.
His most displayed emotions include Happiness, and Sweet, Sweet, Rage! >:D
Deep down though, he hopes to find someone to call his own. Currently, Celeste gives him a weird feeling in his stomach. He thinks he can quench that feeling by fighting her, and whatever she throws at him. :D
"Messatsu! [Destructive Killing Power!]"
Despite displaying a Stoic, quiet appearance towards strangers and "Assholes" as he calls them, he displays a carefree "Goku" attitude and appearance to his friends and other such nice people, seeming clueless and happy.
Shungoku practices a Martial Art called 'Venusian Karate.' He somehow learned it despite the style requiring 6 arms and not two. The 6 arms rule was how the style was performed, with intense disregard for the target's health. It was a sort of freeform style of pugilism and the point of going to classes was to learn techniques and forms from other styles.
Venusian Karate also emphasized the use of 'any, and all means to destroy the opponent, inside and out.' From Pressure points, to the occasional Mailbox.
Perhaps the largest weakness of this fighting style of Satsu's, is the fact that he's a Berzerker: He's so blinded by rage, he's too busy trying to tear you apart, or epically shout for no reason while 'powering up.'
Shungoku Satsu was born to a Simple Family, going to school and all. He was the kindest guy you'd ever meet. However, Constant bullying revealed his more enraged side that desired blood to atone for any wrongdoings done to him, or his loved ones. When he saw Celeste's face for the first time, an odd feeling was in his gut. All he knew was he had to fight her. Even if it meant taking out a couple copies, and some challenges, first.
He hopes to find the girl of his dreams one day, and hopefully get successfully married, and have a son to pass on the blood, and art of fighting he has come to love.