Slithering in the Shadows

"Did I know back in 2nd year that I was falling for darkest wizard of all time? No. Did I think he was the prince charming he appeared like? Luckily, no, I knew he had a dark side, just did not know how dark it was." What if Nagini was an animagus? What if her story can be found between the lines of the story you thought you knew? Here is the tale of Tom's secret servant - Nagini.