Not sure whether to tag that flower in the last panel as "expressive hair" or "ahoge wag", as it isn't technically part of her hair. I used "expressive clothes" for the frog, so maybe that can apply here too...
Keep 'em apart, Reimu. Sanae's sprout is trying to blossom, as she's found someone operating on the same wavelength. Nothing good would come of their meeting. Just another incident.