Rurouni Kenshin; The Last Hellhound

I took inspiration from teen wolf for this. The character Parrish was cool I liked how he was a hellhound. Basically, I'm taking the Nemeton and the Hellhound from Teen Wolf and putting it into a Rurouni Kenshin. Whoever hasn't watched Rurouni Kenshin, it's just about a boy trying to move away from his past and fighting bad guys. The plot of this fanfic is that Kenshin is a Hellhound, not just any Hellhound, the LAST Hellhound. His duties are written in blood and worse of all the Devil will soon break out of hell with the help of Kenshin and then everything will go to real Hell.