im a really big fan of the idea that the yellow flowers symbolize CHARA rather than the goat family. because they came from the surface and have spread across the underground through asriel and chara's death, and they've entrapped asriel in a soulless body just like he's trapped in his memories of chara and desperately clinging to whoever he finds that reminds him of them, and they've also taken over asgore's garden and destroyed all his other flowers just like weeds such as the sadness and tragedy that was chara and asriel's death have trapped asgore in misery and taking actions he wished he hadn't. they even follow toriel back to the ruins when she tries to run from her sadness, showing that she hasn't left it behind competely (such as her taking charas body back with her). when you FIGHT undyne and kill her along with the usually battle text, the text "flower pollen drifts in front of you" also appears which symbolizes that you acting via CHARA's influence (that is to say YOUR OWN) rather than frisks.
anyways hey whats up everybody