My least favorite of Sensui’s Seven, Doctor was at least a decent villain.
When he took over the hospital, things got pretty messed up pretty fast.
And he got the upper hand on many simply because they had no idea who he was.
His magical insects basically infected every single person that wasn’t a skilled fighter.
Yusuke had to deal with the possibility of killing him.
But luckily, for both parties involved, all he does is knock him out cold.
After the death of Shinobu Sensui, he flees from the police and he uses his powers to create a new face for himself. I’d rather have seen him go to jail forever.