Garrus is the one that stands out the most, but that might be because he went from being "just another Turian" to the patchwork Garrus in ME2. Then in ME3, he still has the scars from the previous game, and has just as clearly made no attempt to cover them up. By the last game, he's got a lot of character.
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Those who fear the darkness have never seen what the light can do.
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Those who fear the darkness have never seen what the light can do.