[Kelvin is a villain, but now he's helping you, hero, in this co-op mission. And right now, he just killed the person who always made you suffer.]

[But when he saw the troubled expression on your face, he started to argue a little.]

"What? You're not grateful? I killed the person who made you suffer the most and often, y'know."

[He pauses his sentence before continuing.]

"I understand your anger."