Birds, flowers, and parks as a whole don't much fall in Rinzler's range of interest. He's spent most of the time since their arrival scouting the more urban structures of the region: towering skyscrapers and spaceside ports, living quarters and the more distant hallways of the Ingress complex.

Still, if Frisk, Asriel, or Chara happen to wander slightly off from the bright field (or peer, at just the right angle, toward that gap between the trees), they might spot an out-of-place contrast of red against black. Rinzler's perched on a stone wall shaded by some of the taller branches, making no real effort other than the distance to conceal himself. Or to mask his observation of the group sprawled out on the grass. Chara's presence isn't one he'd calculated for, but they don't look particularly hostile toward the rest.

...good. He keeps watching, making no move to interrupt.