I'm guessing pullet. One of my EEs had huge tail feathers while the 4 cockerels with her had maybe a quarter inch. The coloring is girly too, and the comb is not as big and red as i would expect a cockerel to have at 7 weeks.
Could you post a better pic of the comb? Right now I'm leaning an eensy bit towards roo because those legs look pretty thick, but I think the comb would be a better indicator. Even my late-maturing EE roo had a bright comb at 8 weeks. Yours is a pretty bird, regardless!