Flowey usually appears as a sentient, grinning, red and white flower. He has 4 red flower petals and 2 white petals. Flowey's face will distort whenever he is hit with magic from Toriel.
Flowey operates under a façade of friendliness and politeness but when he finally drops this act of friendliness, he calls the protagonist a "Mortal idiot."
Flowey is still a malevolent and cruel disposition, calling himself "Immortal", which was proven false in the Genoside Route.
- Flowey was made in the Determined Lab, as an attempt made by Alphys to make another deceased monster alive again with the Determination soul.