Oddly, this comic has the same title as the first one ('The Flower that Follows the Sun', which uses ๅใ) rather than the second one ('The Flower that Arches with the Sun', which uses ๅปปใ), so I've translated this image to reflect that peculiarity.
Well, it's implied that Yuuka's actually a pretty nice person so long as you don't make her mad. THAT is when the "Smiling Monster" who thinks genocide is a fun Tuesday activity comes out to end you. They wouldn't allow her to shop in the village if she was a maniac 24/7. Yuuka's got a temper, to be sure, but it's very easy to not trigger it. Don't trespass on her land, don't mindlessly destroy flowers, and be polite around her.
Headcanon: For all the Touhou jackassery, for Yuuka to be SAD is heartbreaking not only for us, but the usually jerkass population of Gensokyo.
What happened was a relatively rare sharing of information and cooperation that led to a spell-session. Everyone was there, Yukari; Eiren, Kanako, Suwako, Patchouli, etc. Others were allowed, but these did the heavy work. Their goal, transmute "chibi-Yuuka" from sunflower into a body that would not die or replace the current Yuuka.
Some had suggestions that were ignored or vetoed. Remilia suggested turning her into a vampire; Alice suggested a doll. Finally it was decided to implant a philosopher's stone into her chest. Patchouli could make partials, but through the help of several gods and reality warpers, they were able to make a complete one.
