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.
I took the liberty of pixelizing a vector I made of Rainbow Dash in the season 5 finale. I think it turned out pretty well. Maybe I'll pixelize (I don't know if this is even a word ;P) more vectors I've made.
You can find the original vector here: http://rainbowdust13.deviantart.com/art/Warrior-Dash-575451809