3. Danny The Dog (Unleashed)
With his collar on, Danny is a slight, harmless and withdrawn individual with very little knowledge of how to act in a sophisticated or socially adept manner, and he is constantly bullied by his master Bart. This leads to people underestimating him and mocking him. However, once his collar is removed, he becomes a violent, incredibly, fast, agile and skilled fighter who stops at nothing to take down his targets. He is used as a bodyguard and illegal fight competitor to win Bart money. He kills mercilessly. He has suppressed his childhood memories. His mother was a music student with no money, so she offered herself to Bart to get some to pay for her lessons. But one day, Bart shot her when she defied him. Bart raised Danny ever since, not as a human being, but as a dog - obedient, but vicious. Of course, in the movie, Danny ultimately escapes Bart's captivity, having learned about family life and opted not to fight and kill any more, and gets his happy ending, but he is still not to be messed with.