smiley: 

Nahoya is very protective of his younger twin brother and never wants him to cry and isn't afraid to get his hands dirty. He enjoys a good fight and a strong opponent. And is extremely hard to read for his opponents because of the constant grin on his face which is still present whether he's mad or tired.

Nahoya is loyal to his friends but his strongest loyalty lands with his brother.

He has a lot of respect for mikey, he got real mad when he thought takemichi was disrespecting the former, still keeping his grin

angry:

Contrary to his appearance, Angry is kind and a pacifist. He cares a lot about his friends and wants to protect and support them at all costs. Nahoya stated that he is not the kind of guy to beat up someone because he is too nice for it.