Light Infantry is the mainstay of the GDI troops. Armed with an M16 Mk. II pulse rifle, they deliver light damage to most targets. Although slow, infantry are capable of movement over varied terrain types with little loss in speed. They are also able to pass through certain terrains or hazards that are inaccessible or damaging to vehicles. They are best used for scouting.

Voice-wise you are free to provide a voice which you think would suit the unit best. Courageous? Shouty? What do you see in this character from the description, lines and image provided? 

Unlike the cutscenes, these units don't have any voice specifics worth keeping.