If You Want To Give Variants Of Fen And Her Brothers Nicknames Go Ahead - Tumblr Posts

Fenris and her brothers and the worlds they live in have consumed me for the time being.

So, have how Fenris came to exist and live with her family. (Mary-Sue vibes but I do what I want)

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Fenris is a human-monster hybrid. You might think this means her birth parents were a human and a monster, but you’d be wrong.

Humans and Monsters have an incredibly low chance of siring children together, simpyl due to how their biology differs-- this, of course, also depends on the type of monster. And even if they do, they’re either mostly human or mostly monster, and thats always decided based on how their SOUL works. Hybrids with Monster SOULS are considered Monsters, Hybrids with Humans SOULS are considered Humans.

Fenris has two SOULS, one human and one monster. She was created to see what a ‘True’ Hybrid would look like, one thats perfectly halved. There was another one, made in the body of a Monster, but the Human SOUL they created for them failed and they dusted soon after.

Fenris was made a science experiment in the body of a two-year-old child, and used for several painful experiments before another Creation started a mass breakout (think SCP containment breach levels). This containment breach is actually what triggered Fen’s ‘werewolf’ form, which was huge for a small child.

Biological Experiments weren’t the only things happening in this Lab, and they had many machines-- including one capapble of multi-universal travel.

Basically-- Containment Breach causes said machine to malfunction while Scientists and other Lab Personel are being murdered by the biological experiments they mistreated. This malfunction peaks when Baby Fen is right next to it, sucking her into an alternate Multiverse altogether. She lands in the middle of Snowdin forest, is adopted by Gaster and Optima, and then either CotM (Center of the Multiverse) or CaL (Chance at Love) happens.

The only reason her parents know something horrible happend was the unremovable tattoo on the child’s shoulderblades, H-01-FE.

Hybrid 01, Fulfilled Experiment.

Some versions of Fen have shoulder blade tattoo’s to hide it, others just never wear clothes that show it.

Fenris does not remember the Lab or the Other Hybrid that was her ‘twin’, but she does get flashes of memories in her nightmares or in situations that are similar.

(this backstory may change a bit depending on AU, like in Sirentale Fenris is still an experiment, but an in-world experiment)