The Lonely One, Vagrant of the Void, the Uninvited. This is a being begotten to the eight Eldritch Horrors, preceding the Void. Each although being horrifying on their own whims, this one, the second of the eight, can be particularly frightening. Though, if you’re careful, you could hopefully escape from its bloodied hands untouched…hopefully.
As mentioned before, the Uninvited is the second coming of the eight Eldritch Horrors. He takes on the form of a homeless man with a torn, grotesque expression and a rather…well, a generally uninviting demeanor (ba dum tiss). Cracked, bleeding lips, long, mangled hair. Probably carrying a new variant of the bubonic plague under its dirt-caked fingernails—not exactly a sort of person you’d invite in.
Which…would be your first mistake.
Although human nature dictates for us to stay far, far away from dangers, this is a danger you can only overcome if you let him into your home, your sanctuary that could prove as your crime scene if you don’t play your cards well.
Turn away and be inhospitable to the Uninvited, he will tear your heart out and feast upon it. Invite him in and be a gracious host, and you may leave unscathed. Which is…not what happens to its first victim in the show.
After being released upon Grenedale by Father Faustus Blackwood, the Uninvited arrives after the Darkness. The first door he knocks on, is the home of one Lucy Anderson. Her mother, Mrs. Anderson, is understandably disgusted and repulsed by the Uninvited’s appearance and odor, insisting she can’t help and turns him away.
Instead of gracefully taking this understandable reaction, the abdominal being instead teleports straight into the home, and he tears out Mrs. Anderson’s heart, consuming it in front of Lucy, who looks on horrified.
At least the next door he knocks on has better luck—albeit due to a supernatural ability that Mrs. Anderson is not beholden to. Armed with the Cunning, an ability to see beyond time and space, Roz is able to figure out how to save both her and Harvey (who was present) from a gruesome fate.
Although not fully understanding the scope of the strange homeless man’s capabilities. Roz still allowed him into her home and fed him some soup, ultimately being able to retain her beating heart. She uses her ability to figure out the nature of the unsightly terror, but he doesn’t stick around long enough for much else, leaving soon after.
At the Pilgrims of the Night Church, the Uninvited is rather warmly invited by Father Blackwood, Agatha, and Ms. Wardwell. They bathe him, dress him, and offer him a new tongue (apparently, he didn’t have one before). Now with the ability to speak, he relays his position as a herald for the Void, needing a sizable audience to complete his mission.
Father Blackwood eagerly helps, as long as he is blessed in return, which the Uninvited agrees to by…well, with a literal reiteration of Communion, to say the least.
The witches turn the Uninvited’s attention to a desecrated church at the edge of the Greendale Woods, filled with witches for a wedding. Advised to not show any mercy, they also drop a helpful tidbit that should the witches turn him away, they will be present at a wedding reception later in Dorian’s Gray Room.
Despite fully knowing about the Uninvited, Sabrina and Nick turn him away at the door, initially not recognizing him due to his much more clean-shaven appearance. They soon come to regret this as later in the reception, he reappears, absorbing an incubus and killing Dorian Gray. Feasting on Dorian’s heart, the Uninvited tells his story.
It’s honestly a sad one. In the beginning, there was only darkness. Then, fire emerged and the few living beings crowded around the fire for warmth and light. The Uninvited tried to join them, however they turned him away. This gave him his names of the Uninvited and the Lonely One, but those that turned him away received retribution swiftly soon after by his own hands.
Thus, logically, he fully intends on killing everyone present at the wedding, as they turned him away. Hilda tries to remedy the situation, apologizing and offering him an invite now, but it’s far too late. Nick argues that since it was he who turned the Uninvited away, only he should be punished.
Sabrina, though, has a different plan.
The Lonely One is, obviously, lonely. Sabrina knows this, and decides to (for a lack of better terms) throw a Hail Mary. So, she offers an invite first, to a wedding down in Hell where none
would turn him away. Understandably baffled but appeased about an invite being given to him first before asking for it, he agrees and travels down into the home of the damned with her.
The wedding turns out to be Sabrina Morningstar’s own, and Caliban’s. As Lucifer walks his daughter down the aisle, our Sabrina whispers to the Uninvited, promising him a lifetime of companionship, to have his own home, and to become the Invited. A promise too grand to turn down, he readily agrees, joining Sabrina and the original wedded couple up on the stand to be officiated by the Dark Lord himself.
After their union, Sabrina leads the Uninvited to the yellow wallpaper house. It takes him but a few moments to realize the nature of the new environment he’s in, but it’s too late. Sabrina had since escaped, leaving behind the Uninvited in his new prison.
The ultimate end of this pitiful terror was at the hands of the Order of Hecate. The Order, through a group effort to destroy the Eldritch Terrors permanently, throws the Uninvited, the Weird, and the Darkness into the Void.