UnderRed is an AU where everyone loves the Colour Red (It means they like hunting for blood as well, except for Toriel and Papyrus).
- All the clothes of this AU is up to the Undertale Community because they always change clothes, But Red clothes.
- Everyone wears kinds of Reds (Ex - Rose Red, Wine Red, Dark Red and other shades of red).
- Everyone has blood on their mouth except for Toriel who has no blood.
- Everyone likes to eat Red Food.
- The Snow in Snowdin is Light Red. (It's called "Red Snow").
- Toriel is wearing Blue and all the monsters are blue as well, even the Ruins.
- Papyrus has Red Paint in his mouth, pretending to be blood.
- Frisk is wearing Dark Blue w/ Orange stripes.
- Flowey has become a Rose Now.
- Asgore's favorite flower is Rose.