[Bad End RE4/DMC AU] Plagas are lower-level demons and Leon didn’t quite get all of his out during the removal process. Now that he’s stuck between two worlds, what’s a guy to do? Befriend another guy just like him, in dual nature and bad jokes.
A Canon divergent RE4/DMC AU about if the Plaga was not fully removed from Leon, was demonic and not organic, and if bioweapons were engineered utilizing recovered demon assets.
What does that even mean?
In Resident Evil 4 (2004), lead Leon S. Kennedy is tasked with retrieving the president’s daughter, kidnapped by an overseas malicious group. During the investigation, it becomes apparent that something is not quite right with the village the group has been hiding in. Frenzied villagers go after Leon in waves until he’s eventually overwhelmed, caught, and subdued.

The kidnappers, revealing that they are a cult, inject Leon with something to ensure his eventual cooperation with them. That something is the egg of a long-dead-now-revived parasitic, hive organism of unknown origin (that’s honestly the lovely unholy lovechild between Lovecraft’s work and Xenomorph inspiration): the Plaga.
In the game’s canon, Leon manages to remove it in the nick of time, kill the baddie, save the girl, and get home safely. A Hollywood cliche, as the main baddie put it.

That’s where this AU diverges. CTHRSIS operates on three specific principles:
- While Leon does attempt to rid himself of his plaga, he only manages to cripple it enough to go into torpor, where all parties (plus medical and decon afterward) are sure he’s clean.
- The Plaga, an ancient species of unknown origin, are Demons (like from DMC) that got stuck in the human world after Sparda (Dante’s father) separated it from the demon world.
- Bioterrorist organizations are using Demon bits and bobs to push science further (like The Order in DMC4). The tech bros to occult mages. Different methods, same vibe.
Once Leon is back in the field, the infected and BOWs he puts down nourish his plaga, eventually giving it the strength to wake again. Our golden boy is not quite right, trying to navigate life after.
What Happens Next?
From there, you have little art updates and timeline stuff to fill in the blanks. Think of this site like when someone writes AU one-shots in no particular order for their fic. If you still have questions and would like a response in the form of sketches, fic-like drabbles, or little treatises. Write to me here!