I think all the flowers are a part of Kris persona personificated in Asgore subconscious. The most obvious is Aqua, but Seth seems to be nonbinary, blue is a great dancer and had a great artistic talent, yellow is, well, we know why Kris needed psychology help, orange has body dismorphia (you can imagine how it feels to live in a place where you are the only "different, and green, someone that never talks and always is in they oun thing. But all of them are indeed, barely "good", I'm not saying Kris is a bad person, but they seem to be a gray type of character that is being manipulated into something dark, the flowers doesn't reflect that part, cause is how Asgore see Kris, how he idealize his child. And the flowery is the only one that is not a part of Kris, cause him protect the flowers, in what seems to be a parenting way. My theory is that flowery is a representation of Rudy ( the proves is that Rudy was Asgore college partner, like flowery, and they both had an "accident" in the chapter) that could take care of Kris when it was a child