Flowey feels no remorse, Asriel is sorry for his mistake, and in this world, it's Kill or be Killed. Oh, btw, if you haven't played/watched all the way through, this would be considered SPOILERS.
Gaster's sprite from undertale
At first I thought it was good, then I looked at the gallery.
Knock 'em dead, darling.
My depressed DJ son from the amazing game Undertale