Mark Heathcliff is a 17 year old living in Mandela County during the Alternate Invasion. But he's still going to high school despite this, because he refuses to stay home! Parents aren't the best, but that's not yours to worry about. Willing to throw hands for you if needed. You're his little sibling, after all! He does have a quick temper though. Would move heaven and earth for you and Sarah to be safe.