Given to his position in the yakuza, Samatoki is an aggressive and intimidating man who can be easily provoked for a fight. When he isn't angry, he is more laid-back and gets along with people pretty well, as long as they don't piss him off. Despite his rather cynical and ruthless mindset, family and team bonds are very important to Samatoki, as he acts as a loyal leader to Jyuto and Rio and cherishes his younger sister a lot. He and Ichiro Yamada from Ikebukuro Division hate each other’s guts.