Splicers

A Splicer (スプライサー, Splicer) is the name given to a being whose body has been genetically altered by Campbel, be it a human or a plagued animal. Those can currently be divided into four categories and can really be considered to be their own species. Very few in numbers, they originate from the Alternative Universe One but are also present, in even fewer numbers, in the Present Verse.

Splicers V1 - Normal
Splicers V1 also known as Type-1, are Splicers that have mutated after ingesting a Campbel-base that has been mixed with the DNA of a different creature than their own. They are the most common type of Splicers and are generally able to live somewhat normally, even after their transformation. Said transformation occurs rapidly after ingesting the Campbel, usually a day or two afterwards, and always at night time during sleep. The results vary greatly from an individual to another, even when the same DNA/base species is used and generally deeply alters the physical looks of the Splicer to be. Nonetheless, the mutations are constantly stable, and almost always give an overall positive result, mostly for species that have been altered with the genes of a stronger one. Type-1, more so than any other type of Splicer, will have a strong tendency to display new personality traits that are specific to the species of the DNA they have been altered with.

Just like with other Splicer types, the mutation is definitive and will not recede or fade away with time. Moreover, additional contact with any kind of Campbel-base will not alter a Splicer in any other way, effectively making them immune to any sort of additional changes. It is sometimes possible for them to keep mutating some more over time, although it will eventually always reach a stopping point.

Splicers V2 - Twins
Splicers V2, mainly known as Gemini-Type Splicers, are an incredibly rare and dangerous mutation ensuing what should have been a regular Type-1 transformation. The mutation starts off in the exact same way, following the ingestion of a Campbel-base, to the exception that upon changing, the Splicer will also quite literally divide in two during their sleep, creating an almost identical clone of themselves. Said clone, malignant and filled to the brim with evil-intentions, is the very embodiment of the original's darkest desires and wishes. Having taken them off from their original selves, they will usually promptly take the upper hand on their counterpart and will not hesitate to start tormenting away any people they can to get what they want. In the event one of the two Splicer dies, regardless of whether or not it was the original, the remaining individual will eventually mutate once again towards a more complete and aggressive form, possibly in reaction to the loss of their other half.

Splicers V3 - Symbiotic
Splicers V3 or Rex-Types, are Splicers that have been infected with Rexes and who use a neutral base of Campbel with their own DNA, to stabilize their health condition. Those see no physical changes whatsoever but need a frequent and regular intake of Campbel to survive, as Rexes will severely damage their health without it. They are the only type of Splicers able to go back to normal if the Rexes are purged off from their body.

Splicers V4 - Corrupted
Splicers V4, the rarest type, are also known as Chaos-Type Splicers. They are the consequence of Rexes merging with a Campbel-base that has been altered with foreign DNA, and given to someone. The result is a Splicer whose body has changed very little physically, but that displays the ability to coat themselves in a layer of what looks like thick ink, becoming able to change their body shape at will. Usually, they are unable to hide most of the ink, as it stays put in some part of their bodies, but can sometimes even extend it to objects and other things, to take control of them in a way or another. Just like Rex-Types, V4 are strongly addicted to Campbel, and need an increased dose with each passing day to survive. Because of that and due to the rarity of the product, they have a very short lifespan.

(They really are in their own category... But why not look at another species?)