Eve had jumped up to a fire escape at the front of the alley, and had thought to jump right on top of the guy once she was on the roof. Which was within seconds, with her speed. However when she saw the situation it was clear that her help wasn't needed. Or not yet at least. Jurgen wasn't even fazed it looked like. And with relative ease he took care of his assailant himself. 

And then he started to walk off again, without even noticing her... "Yo, up here!" She called out, jumping down to the ground and landing with a soft thud. She may be nimble, but her cybernetic body was still a bit on the heavy side compared to a human. "I thought I'd give that man a surprise of my own, but since you were able to handle it I decided to just watch instead." She threw the bud of her cig away since it was finished, then joined Jurgen on his walk back to the apartment. At first Eve had thought that she might have to also act as bodyguard. But clearly at least against the usual muggers and burglars he would be perfectly fine on his own.