YOU SAID:

So basically there's this tiny angry little girl who is a thief and she makes friends with a nobleman's son

INTO JAPANESE

だから基本的には泥棒であるこの小さな怒っている少女がいて、彼女は貴族の息子と友達になります

BACK INTO ENGLISH

So there is this little angry girl who is basically a thief and she makes friends with the aristocratic son

INTO JAPANESE

それで、基本的に泥棒であるこの小さな怒っている女の子がいて、彼女は貴族の息子と友達になります

BACK INTO ENGLISH

So there is this little angry girl who is basically a thief and she makes friends with the aristocratic son