Another Uzumaki?!: Naruto's Sister?

Uzumaki Akira is the first child of Namikaze Minato and Uzumaki Kushina. After they died, she took sole responsibility of raising her brother, regardless of her young age. Akira and Naruto were able to live in bliss, satisfied with the things that they have despite being constantly tormented by most of the villagers...

Slight Chance

Marionette goes to Adrien's holiday party, which causes her to run away as Ladybug. Chat Noir chases after her in attempt to find out what is wrong with his lady, and this starts a whole chain of events.