She had independent agency, but I think you're correct that the film's ending is trying to show that she ultimately (spoilers!) just wanted to observe and imit

She had independent agency, but I think you're correct that the film's ending is trying to show that she ultimately (spoilers!) just wanted to observe and imitate humans (on a street corner, where the density of observable humans is very high). I still think it's left as an open question to the viewer, though. After all, humans spend their whole lives trying to imitate and improve upon the actions of their ancestors.