The cast of At Home Alone. Spoilers are unmarked.
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The Protagonist
Persia
A young, pink-haired girl left alone in her house while her mother goes off to work.
- Creepy Child: The protagonist starts out relatively normal, but her insistence that Kangtai come play with her slowly morphs into something much more sinister the longer you play the game. If you choose to stay with Kangtai while he eats cake, rather than go outside when his brother rings the doorbell, the protagonist lures him outside into the backyard and tries to bait him into hanging himself.
- Cloudcuckoolander: The protagonist seemingly has no trouble inviting in random strangers from the streets and shows no reaction to hearing gunshots in her house or to another child's apparent gruesome suicide. Then again, one of the endings implies she is completely aware of what's going on.
- Dead All Along: She was shot by Kangtai before the story began, and was placed into some sort of purgatory by the Birdman, forced to relive the day of her death again and again until she sacrifices Kangtai to him.
- Given Name Reveal: One of the endings reveals that the protagonist who went unnamed the whole game is named Persia.
- Villain Protagonist: In the first part of the game, she made a Deal with the Devil to kill Kangtai, a child, and sacrifice him to the Birdman, and spends the first few weeks doing so. Afterwards, however, she switches to trying to break free from the Birdman's grasp.
- Would Hurt a Child: The protagonist's actions towards Kangtai become more and more cruel over the course of the game, to the point she chases him down with a gun after he refuses to commit suicide, shoots him several times and calmly watches as he falls off the balcony. Then again, considering who Kangtai most likely represents...
The Mother
The protagonist's mother, who goes off to work.
Kangtai
A red-haired boy and the first visitor. His disappearance sets off the plot.
- Asshole Victim: He gets turned into a child, trapped inside a sort-of purgatory, shot dead, and then convinced to hang himself so his soul can be sacrificed to a demon. However, he in life was a burglar and Serial Killer who shot Persia dead in the past, and is being killed in the same way he murdered her, so its not completely undeserved. He actually becomes The Atoner and tries to save her soul.
- The Atoner: He was a Serial Killer who murdered Persia in the past, and winds up being sacrificed by her in revenge. However, his soul is the Big Good who spends the game trying to free Persia from the grasp of the Birdman.
- Big Good: His soul is trying his damnedest to free Persia from the Birdman, repeatedly Addressing the Player to instruct you on what to do.
- Cloudcuckoolander: Kangtai is a little odd. When he first shows up at the girl's doorstep, he seemingly has no memory of how he got there or why he's here, but then forgets all about it when the girl offers him cake. Once he enters her home he never once talks about his amnesia again, instead gushing about how big and comfortable the house is and how much he likes the cake.
- Serial Killer: According to the police, Persia was only his latest kill- he's wanted for murdering others as well.
- Would Hurt a Child: As a burglar, he killed Persia, a young girl, who was in the house he broke into.
The Blue-Haired Man
A blue-haired man looking for Kangtai and the second visitor.
The Blonde Girl
A young blonde child and the third visitor.
The Crow
A tiny crow who serves as the save point character. He is actually a demon and servant of the Birdman.
- Chekhov's Gunman: He seems to just be a non-sentient crow who is only there to serve as a save point. Turns out he is the Birdman's servant who helps watch over Persia and guides her.
- Creepy Crows: Initially averted as he is just a normal crow. Then he turns out to be the Birdman's servant. However, he eventually subverts it by doing a Heel–Face Turn.
- The Dragon: The Birdman's main servant. At least until his Heel–Face Turn in the true ending.
- Heel–Face Turn: In the true ending, he helps Persia escape the purgatory and save her soul from the Birdman, then protects her in the new reality when the Birdman tries to reclaim her soul.
- Villainous Rescue: In the backstory, he saves Persia from the Human Trafficker who almost abducted her while still working under the Birdman. This does eventually translate to a Heel–Face Turn, however.
The Birdman
A demon who resembles a white-robed plague doctor. He makes Faustian bargains with people, agreeing to give them one wish if they sacrifice a part of their soul and someone else's. He's the one who revived Persia and the others, trapping them in a strange realm, and agreed to reunite Persia with her mother- as long as she sacrifices Kangtai, her murderer, to him.
- Big Bad: He is the entity responsible for abducting Kangtai and keeping the protagonist and the others trapped in an endless loop so he can consume their souls.
- Faux Affably Evil: He's polite to the people he makes deals with, likely to make them more receptive, and to his servant Crow, even though he only cares about them as means to gain souls.
- Final Boss: In the true ending route, he is the last enemy Persia has to outrun to escape his realm for good.
- Light Is Not Good: He is a creepy Plague Doctor-like demon dressed entirely in white.
- Karma Houdini: He never gets punished in any of the endings for trapping the cast's souls. Even in the best ending, Persia manages to escape him, but he's still around, off to find his next victim.
- One-Winged Angel: In the true ending route, he turns into a giant crow-like monster with a red eye and chases Persia down.
- Plague Doctor: He resembles this with his beak and robe.
- Reality Warper: He seems to have absolute control over the purgatory that Persia and the others are trapped in, to the point of being able to fast-forward time with a remote he has.
