Characters taken as a basis:

Classic - Nono (The main protagonist of the multiverse)

Fell/Red - Kling

Outer - Nono

Swap/Blueberry - Eluca

Limbo - Darksider

Science - Ele

After/Geno and Error - Carl

Echo/Patch - Sapphire

Ink - Ron

Dust/Murder - Elma

Wikipedia - Andy

Dream - Puzz (The guardian of kindness)

Killer - Copper

Hate - Rinny

Paper Crane - Lightsider

Scoundrel - Lilly

Nightmare - Bloon (The guardian of pitiful)

Horror - Batric

Error 404 - Rabbot (The teacher and the alliance)