Lisanna Strauss

Lisanna Strauss is a Mage of the Fairy Tail Guild, the younger sister of Elfman and Mirajane, and a childhood friend of Natsu Dragneel. Lisanna is shown as a young petite girl with short, white hair and blue eye. Lisanna uses Take Over Magic. She is kind, understanding and cheerful.

When Lisanna was younger, she helped natsu to hatch Happy's egg as she was a little more knowledgeable than Natsu.After seeing a softer side of the usually flamboyant Natsu, she stated that he was a lot like her sister and joked that perhaps later she should become his bride/wife which predictably freaked him out.
Whilst raising the egg with him, he learned it was "impossible" to win in an argument with her. Lisanna apparently likes animals. The little cat was named happy after hatched. As Lisanna pointed out the change of atmosphere from one of anger to happiness after the 
hatching so Natsu named him Happy. Lisanna always mentioned Natsu and her self were parents of happy. Because of her personality, she can easily adjust and be accepted by anyone.