Rikki keeps an eye on her for a while, crouched at the edge of her high perch where she can mostly keep the girl in her line of sight no matter where she goes. Occasionally she loses track of her behind other buildings, or in the rare patches of shadow, but silhouetted against the glow of the turtle's shell, it rarely takes long to pick her out again.

This looks more like reconnaissance than a regular patrol; probably one of the new arrivals, then. Whoever she is, she's obviously practiced at this method of getting around - and while not all the possible reasons for that are necessarily good, as long as she's stuck here, she's theoretically an ally. Might as well go say hi, now that she can do it without sulking over the fact that she's not Anya.

Rikki waits until the girl's settled down in one place and marks that position in her head before she pushes off her rooftop and takes off running, barely touching down in one place before she's springing into the air again. When she gets within a few blocks of the last place she saw her, she starts slowing down, bleeding momentum in flips and rolls until she can come to a stop across the street from the other girl's rooftop, close enough to be noticed without accidentally scaring the crap out of her.

She catches herself at the very edge of the roof, just short of hurtling into the street, and laughs a little breathlessly, giddy with the momentary rush of adrenaline. Still grinning, Rikki waves a hand at the girl across the street. "Hey."

Just a friendly rooftop buddy, nothing to be alarmed about here...