He was good to use it because danzo is evil lol
And it would clear the name for his love of his brother, sasuke was so sought out on bringing danzo down, and danzo deserved it
Using ameterasu on danzo was the "right" thing to do
sasuke can use amaterasu at will, no emotion is required, he is even more advanced at it then his brother was, he can shape the amaterasu, remember the fight with the raikage?? that was a pure desire to use amaterasu
edit reason: don't know what happend here but the post seems to have dubbled and added that last scentence
Last edited by Sentinel; 10-12-2012 at 06:43 PM.
Reason: some crazy stuff happend here