I imagine that the person next to Sumi would be glad (or annoyed, depending of the setting) of having a companion just like her, bringing a spring on its step everywhere they go by...
We need more images, of Sumireko hanging out with the viewer..
There might be an interesting shop over there....Ah, sorry.I went ahead all by myself.Hm, then, so that we don't get seperated, let's hold hands....Don't let go, okay?Hey hey, wanna head over there next?