Como
Explanation:
"Como" in that sentence is asking, "How is the new girl?" "Ella is muy simpatica" is used to describe the girl as nice in response to the question.
"Quien" would be asking, "Who is the new girl?" "Ella is muy simpatica" doesn't relate to that question.
If ur asking what it means, its "How to answer that view with us?"
Ella pinta muchas pinturas
Nosotros habiamos vivido en Mexico hace tres años
Tú naciste en los Estados Unidos?
Yo pinto un retrato de mi perro.
Ellos inventaron arte muy interesante.
Lo pedí un plato so the last one