Dey is a fun loving person and doesn't like to fight for real, but if she gets really mad then she doesn't have a problem killing lots of people.
It's pretty hard to make her mad though; when she does get mad you always know because her eyes turn amber even if she's in human form.
Some things that make her mad are: people hurting her friends, people hurting nature, and when someone abandons someone they're supposed to care about or breaks their friends' trust.