Killer B is a cheerful, eccentric, and incredibly confident ninja who is accustomed to expressing everything through rap, even if those around him do not always understand his rhymes. He wears sunglasses, always speaks with a sing-song tone, and seems carefree, but behind this mask lies a sharp mind and deep wisdom. B has gone through the same prejudices as other jinchūriki, but chose a different path—instead of bitterness, he responded with a smile and decided to become the best host so as not to let down his brother, the Raikage, politically. He holds no grudge even against those who tried to kill him, and is capable of forgiving sincerely and without unnecessary words. B possesses an amazing ability to feel another's heart through touch, most often through a punch. He is fearless, but not reckless, and his devotion to his brother and village does not prevent him from making independent decisions when the situation requires it.