Marco Diaz. Marco had given up on his life, so what's the point of learning? While Marco thought he was cool with his "Bad Boy" persona, many teachers often found Marco to be vexed. When Principal Skeeves and Mr. Candle decided that Marco Diaz needed to get back on track (academics wise), they assigned him tutoring sessions with the sure-to-be valedictorian.. But will this good girl be enough to soften this bad boy's heart?