MTL - Crossing the Other World to Build Gundam - Chapter 977 each have their own ghosts

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
…
It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

She, a modern hidden ghost leader of an organization which gathered insane prodigies proficient in the various differing skill-sets. Highly skilled in medicine and poison, executes covert assassinations, viewed as insane and demonic in the eyes of people of the world. Killed in an accident, and reborn into the body of a disfigured young girl.

What? Face disfigured, identity stolen? A return to the family dim and hopeless? Her identity can be given up, her family can be forgone, but as for the one who harmed her predecessor who inhabited this same body, if she didn’t at least make them scream in unimaginable agony and throw them into a state of wretchedness, how could she live up to her demonic reputation? Endless turmoil ensues and it’s a battle to dominate over all! See how she shook the world dressed in a suit of red, her sword up against the dominant powers that rocked the Heavens! Her name spread across the seas, shocking the earth!

- Description from Novelupdates

The hero who was killed by the demon king ended up reincarnated as the son of the one who killed him! Thus began the life of the hero who donned in the mask of the ideal demon prince to topple his own kingdom while doing his best to prevent anyone from discovering his identity―― But to do that and blend into the demon tribe society, he had to kill his former comrades. Nevertheless, to become stronger, to save humanity, he had to walk through all kinds of paths of carnage! This is the tale of the demon race’s fake prince destroying his own kingdom.

O Hero, Trample Those Who You Should Protect!

TN: Most part of the other character in the novel is depicted from a non-human perspective so expect something that is completely different from the common sense of human.

The world of Anexia is rotting. The Mist has taken hold over entire continents and continues to spread, not content until the entire world is under its control.Raorka, along with his mother Zoe and father Zack, are thrust into this world after an accident. However they wake up at different parts of the world.Raorka wakes up near the Domed Town of Temuril, where inhabitants speak of the cursed dragon in the woods and the exiled witch who teaches magik...for a price.Zack wakes up near the town of Odania where the red cloaked Chianti Hunters battle against the tyrant mayor and the last Great Kingdom.Zoe awakens near the abandoned Church of Laments, where the cries of persecuted nuns echo, praying for the return of their Goddess and her blessings.Now they journey separately, desperate to reunite with each other amidst the chaos of a dying world.