This is Emily. Isn't she darlin'?
Getting her to play nice with Maverick has been hard, though. Or rather, getting Maverick to play nice has been hard. This is not entirely unexpected; introducing new rats to each other often takes time. One accepted strategy is to put dabs of perfume on the rats so as to mask their scents, and then introduce them in neutral ground. It's taken 4 days of doing that, but the two girls finally are able to stay in the same cage without fighting.
They have, however, constructed separate nests in far opposite corners of the cage. Ha!
UPDATE: They now sleep next to each other (aww), but they still fight over sunflower seeds.