When a group of firefighters met 6-year-old Finley Brown at a summer festival in Moraga, California, they were instantly charmed.

Finley, who was diagnosed with a rare type of kidney cancer and had been going through months of chemotherapy, walked right up to group, introduced herself, thanked them for their service, and began a lively conversation.

"She was quick to show off her scars and tell us what she had been going through, but that was the least of her concerns," Lucas Lambert, one of the firefighters, told ABC7. "She had a big personality."