A lawful good character acts as a good person is expected or required to act. She combines a commitment to oppose evil with the discipline to fight relentlessly. She tells the truth, keeps her word, helps those in need, and speaks out against injustice. A lawful good character hates to see the guilty go unpunished. Alhandra, a paladin who fights evil without mercy and protects the innocent without hesitation, is lawful good.
Lawful good is an alignment which combines honor and compassion.However, some, especially paladins, may sometimes find themselves faced with the dilemma of whether to obey Law or Good when the two conflict - for example, upholding a sworn oath when it would lead innocents to come to harm - or conflicts between two orders, such as between their religious law and the law of the local ruler. Because of this, lawful good is sometimes the most self-destructive form of law and good (compare with chaotic evil), due to losing ones self to conflicts between altruism and ethos.
The upper plane of Celestia embodies this concept.