Like many of Shakespeare's female characters in the comedies, Rosalind is strong, intelligent and resourceful. she also has a great sense of humor.
It takes a strong young woman to be able to live in the court knowing that her uncle is the reason her father has been banished. This strength comes from her companionship of her cousin. Celia. Their relationship is important for both of them.
Once she is told that she must leave, she is resourceful in coming up with the plan which takes them to the forest of Arden. These disguises prove to be perfect. Nobody recognizes them.
Her intelligence and sense of humor are evident in many ways. She uses both in order to teach Orlando how to woo. As for Phoebe's infatuation, she finds this amusing and we get the double meanings she uses with her.
All in all, Rosalind is a delightful character and remarkable young woman all things considered.
Rosalind dominates As You Like It. So fully realized is she in the complexity of her emotions, the subtlety of her thought, and the fullness of her character that no one else in the play matches up to her.