Fairy Travel: Beginning with Honkai

A free read: a fairy who set out on a journey after dying. She planned to scavenge a few bargains in the Honkai world, but accidentally saved two people who were half-dead. Now her journey includes a mom who can cook and a big sister who'd love to slaughter the whole world (and neither of them is any easier to deal with).

From then on, her travel plans went completely off course: Merlin talked her into saving Uruk, and she helped herself to the King of Heroes' treasury; she went to Type-Moon to be a proper "sneaky" Master, taking a Grand Servant along to rob the Holy Grail wherever she went; then she kidnapped Gensokyo's famous Number Nine and turned Elysian Realm into her own massive shelter.

A fairy who's unbearably mischievous, unbeatable at arguing, and eager to snuggle up to any pretty girl is trying to elegantly save the world (and pick up some loot along the way).

Of course, elegance is out of the question. She does whatever she wants and is mischievous to the extreme.