My idea was more that each of the flowers represent how Asgore sees the people important to his life, but Asgore is so obsessed with the past they're all outdated interpretations
Aqua is definitely Kris yeah, but Seth being the smarter one who tries to reign in Aqua makes me think they're probably Asriel or Noelle
Blue and Yellow are the early days of Asgore and Toriel's relationship, where Yellow is this self-punishing-self-hating-pretty-stupid cowboy who's only managed to get their far because of his partner, who just happens to be the kindest, smartest, most elegant of all the flowers
Flowery is very very clearly an analogue to Rudy, literally saying he was his college roommate, which is what Rudy was to Asgore in real life. And then also all the gay stuff
Green and Orange in struggling with tho, Green I could see as being Gerson, who is someone everyone in the town loves because they know exactly how to act to help everyone in every situation.
And Orange I could see being a young Undyne. She's desperate to be strong and looks up to the other flowers, even calling herself a justice like yellow (who would be asgore) and she struggles to show that strength even though she very much does have the capability to be the strongest since she has THREE omegas