Masa has a bad habit of getting himself into trouble with either a rival gang or the police.
Masa is also very lazy, often keeping his house very messy and he never bothered to clean it, it is also seen that Masa struggles to hold down a job often and is on the cheaper side to try and save money as much as he can, he's a bit on the stupid side and is quite stubborn and doesn't mind getting into fights if needed. He's honestly respectful towards his superiors but doesn't know when to shut up.