As it has been explained to her, she was sent here to prevent the world's collapse when the chaos finally arrives.
She, as a transmigrator in another world, will need to gather the twelve guardians of the Zodiacs, then she will be granted three wishes.
She should wish peace for in this world. The two other wishes can be anything she want them to be. Of course, the third will have to be her wishing to go home, or she will be trapped here for all eternity.
She already felt giddy over the prospect of being in a brand new world, soaking herself in an adventure, and of course, on top of it all, having at least one wish that can change her life.
If you think about it, it is like Aladdin with his magic lamp and genie. Only that she first needed to overcome the challenges before she can be granted anything at all.
The first Zodiac is the Aries, and as the novel's events would dictate, the guardian of Aries will be the first person she would encounter.
