Kitaarashi

He is a former sumo wrestler who went down a criminal path and was imprisoned. What he was like before his debut is unknown, but after suffering from the Vacuum Palm and awaking from his comatose state, he was reduced to a coward and cried like a baby after hearing the sound of hands clapping, because that sound reminds the moment when Ryuukou Yanagi hit him with his palm in the face.

(Source: Baki Wiki)