Two things. One, she IS Asian-American.
Two, how does one act as though the existence of a divine being outside of space and time cannot possibly be confirmed or denied with sufficient certainty.
Because that's what agnostic positions on theism/atheism mean.
So, do you think she is an agnostic atheist? That would mean she does not believe there to he a god or gods, but it cannot be stated that there definitely are none due to their elusive nature.
An agnostic Muslim would believe in Islam, but acknowledge that divine nature cannot be proven by earthly measures.
What she behaves like is apathetic towards the veracity of cultural institutions and religious claims.
She probably hasn't even formed an actual opinion on the question of whether there is or are any god or gods.
You have to really be confronted with incongruence between religion and world to really engage in this debate.
And she never really did that. She performs her culture, fulfills expectations and that's that.
To even consider an agnostic position she would need to form a position after seeing how there is a debate.
But she is so secular-minded, she engaged more deeply with questions of fanfic etiquette than epistemological arguments on religion.
She is plenty shaped by her upbringing, though. By her pragmatic parents, Urdu language, cultural expressions of Pakistan and Jersey, her friendship with Bruno, the proximity of heroes...
Religion just wasn't that big a part.