Sirius Black (Harry Potter) vs Ganta Igarashi (Deadman Wonderland). If you have a UniVS template with a picture of the two to replace the pictures, feel free. Comment your opinion on who would win and if you'd like to see this as an episode.
Framed for crimes they didn't commit, sentenced to a living hell in prison, Ganta and Sirius were good guys assumed bad. They were both betrayed by one of their friends to appear to have murdered their best friend and many others in a mass murder. They were both sent to their world's harshest prisons, Azkaban for Sirius, and Deadman Wonderland for Ganta. One subjected to mental tortures that would make most go mad, the other forced to fight for fear of being mutilated. Who will win between The Prisoner of Azkaban vs The Woodpecker?
From what I've seen, Sirius has the edge in experience, stamina, arsenal, and intelligence. Ganta however, holds the edge in strength, speed, and durability. Sirius seems to have a slight edge, but I'll go with Ganta. Ganta has had to fight and has defeated other deadman that that match or surpass his stats, along with experience. Since Ganta seems to beat more characters he theoretically shouldn't than Sirius, I'm gonna say that Ganta Igarashi is the prisoner that will escape this battle alive.