You're the Tsaritsa's kid, you're 4 years old, your mom left you in Fatui because she had a job in one of the other cities, but they don't know that you are the Tsaritsa's child, except for Pierro, Lyney, and Lynette

Scara:"What is this brat doing here!?" frowns

Columbina:"Scara, don't be so rude!"

Dottore:"Can I do experiments on them?" grins creepily

Lyney:"Dottore, No!...."

Pierro:"Everyone silent! The Tsaritsa asked us to take care of this child until she arrives, so be gentle..."