Tuff is a young boy about a head taller than Kirby. His skin is a light orange color, as is the top of his hair. The tips are green, with the colors separated by a zigzag. His hair goes down over his eyes, which are never seen (though the writers assure us that he has them and can see just fine). He only wears a pair of purple shorts held up by a single red suspender, and green shoes.
Tuff is a rowdy and mischievous young boy who has a good heart, but not much in the way of intellect to go with it. He loves to play games like soccer and do other outdoor activities. He also loves to pull pranks, though usually on people like Dedede so he can easily justify it (however, sometimes his pranks cause trouble for the people of the village as well).
Tuff lives for having fun and doesn't take many things seriously. He often falls victim to Dedede's plots like many others in Dream Land because of it.
Tuff is the brother of Tiff and the son of the Cabinet Minister Sir Ebrum and Lady Like. Despite how the two are polar opposites in many ways, he and his sister get along well, though she doesn't like when he pulls pranks and causes trouble and often tries to ruin his fun. Tuff also tends to argue with his mother when it comes to things like studying, but his father is more lenient with him.
He doesn't usually take Dedede and his tricks very seriously, but he tries to help his sister stop him or to try making Dedede's life as difficult as he can.
Bun rarely interacts with Meta Knight or his followers, though never shows any outright hostility towards them when he does.