Mega Man X is the titular main character of the Mega Man X series.  He is a pacifist and wants to avoid all fighting if possible. However, he is not afraid to fight if he or anyone important to him is in danger.   X's fighting potential is incredibly vast, he is prone to moments of incredible rage, and very few have seen it and lived.

X's distaste for fighting is rarely seen in-game, but I feel it is important to play into that aspect of his character with this dub and future X dubs. As such, X's voice should be a calm, welcoming voice, someone who would hear out anyone who wanted to talk. However, you should also have the range to get angry and show off X's hidden rage.