Undoubtedly, one of the best features of BioWare's Mass Effect series is the characters. As each Mass Effect game largely revolves around its narrative, every character needs to be intentionally crafted in a way that adds emotional depth and nuance to each story, and BioWare has been known to take this assignment rather seriously. In light of Mass Effect's history, it's likely the same caliber of characters will be present in Mass Effect 4, the next mainline installment in the series, but it may have difficulty topping one particularly beloved character from the original trilogy.