Grumbling Dwarf always wakes up on the wrong side of the bed and is constantly in a bad mood. That is why he is rude, impolite and condescending. However, we should recognize that he is the cleverest and most competent of the dwarfs. Despite all the traits described above, he has a very kind heart. In fact, he loves all the dwarfs very much even though he strongly denies this fact.