Ugh this much tragedy should come with a bloody disclaimer! I wouldn't have touched this story in the first place.
Does that mean though that Arya would grow up looking up to her sister with a reverence? Hearing so many stories would've surely impacted her.
Will she want to become like her or grow resentful of this person who isn't present but holds a piece of her parents' heart?
I don't think she'll be resentful. She's far too young to be so. Reverence maybe, but it might be more awe and fascination. Her big sister gets to travel the world so she may want to do the same. But given how she carries the police doll with her all the time, she may be fixed on wanting to be just like her dad instead.