* Gentle: Lennie is fundamentally kind and caring, despite his physical strength. He wants to be friends with everyone and is easily hurt by unkindness.
* Childlike: Lennie's mental capacity is limited, and he often acts impulsively and without understanding the consequences of his actions.
* Loyal: Lennie is fiercely devoted to George and would do anything for him. His loyalty and friendship are perhaps his strongest traits.