Pure of Heart

Pure Good, also known as Pure of Heart, is the direct opposite of the Pure Evil (a villain who is the most evil and depraved, without being redeemed). It means that they want to make the world better, or at least keep it from getting any worse. Opposed to what you would think, being pure good doesn't mean being a perfect, flawless hero. Not for themselves, but for everyone that lives in it. For this type of hero, doing good for them is as natural as living and breathing. They can be identifiable through these traits:

Pleasant: The character is basically nice and reasonable with any other character, and tries to get along with anyone who interacts with him or her, even if they are hostile to him or her.
Selfless: They think about others before themselves, and wouldn't hesitate to risk their lives to save others, sometimes even people they don't know.
Incorruptible: No matter how many times they are tempted, or how much pains they go through, a pure heart doesn't surrender to his or her inner demons, like anger.
Forgiving: They give their enemies chances and allows them to redeem themselves. Sometimes, they even save their enemies, after being their victims.
Reluctant to Kill: Some never kill any foe, no matter how cruel they are. Yet some do, though only in self defense (or in an equitable fight), in last resort, and with remorse. Heroes who have fun killing cannot be labelled pure goods, if they kill more than one person at least in a limited number.
Acts: A true hero shows his courage through actions, such as saving lives, or at least making life much easier for people in need. And most importantly, they expect no reward, and that goes for certain greedy heroes who can show their nice side.
Naïve: Sometimes, the hero just can't grasp unto most concepts, such as technology, money, or intercourse. Mostly, this is why they aren't interested in power or greed. Heroes that have this trait often are children or grow up in a primitive society.