fight+and+then+disguise+her+self

Fennec decided to disguise her self. She lives in a nice home and works as a house designer. But when the world is in danger she goes and saves the world as (earth affectionately has come to call her) Green star. then the people from her planet come to conquer Earth but they don't know that Earth is where Green Star lives.

What should she do

defend Earth from her own people and risk being destroyed

or

help her people to defeat Earth and be hated be everyone on earth