Killer B (Adoptive Brother)
A ( エー Ē) is the Fourth Raikage of Kumogakure.
He is a tall dark-skinned man with a large muscular build, with his blond hair, combed back, a small moustache and beard. His face is very distinguished with pronounced cheekbones and tear troughs under his eyes, and a prominent crease across his forehead. He has pointed canines and his top lip also has a darker hue than the bottom one.
A is very caring and protective towards his younger brother, despite Killer B's status as a jinchuriki. A holds strongly to the belief that the jinchūriki is not an individual, but instead is a tool of the village they live in and its Kage and as such, have no right to make decisions for themselves.
He also somewhat has an aggressive and impatient attitude at times, as seen when he bursts through the window to get out instead of using the door. As an experienced shinobi, A believes that shinobi are "fated" to hate one another and told Team Guy that he had spent his entire lives fighting shinobi from other villages.