Ava hasn't had a very pleasant life considering that she has been possessed by a rather angry demon since birth. Said demon has constantly attempted to either kill, or pressure her into making a "Pact" without any explanation of what it entails. The story begins some time after Ava was separated from her parents and sent to a re-education planet terraformed and run by TITAN Inc.
Back from the Dead: Was brought back to life after she finally formed a pact with Wrathia.
Another child brought to the re-education planet and one of few children Ava has ever been friends with, although the friendship didn't last long due to Wrathia's tampering. She is odd in her own right and seems to have a few issues about image. She has problems with Odin who she views as a stalker, and is arguably justified in thinking so. She also has an enormous crush on Gil.
Ax-Crazy: Not completely but she is definitely showing signs of this. In her Dream World. She crushes a fairy with her hand, kills off a number of flowers (they're alive), throws a portrait on the ground... (The first two aren't actually real but still...) She also began to hit and attempted to strangle Ava, believing that she was an illusion made by Tuls.
Even in the real world, she was going to just let Odin and Ava die when the spaceship crashed.
Berserk Button: Don't call her ugly, monstrous, or scary, she will take it out on you.
Dark Action Girl: While probably not evil, she can be violent and is quite the Jerkass. Maggie once tried to kill both Odin and Ava by attacking Odin and crashing his ship without an ounce of regret. She technically succeeded in Ava's case.
"B-before you d-do...an-n-ything rash, I...n-need you to just...h-hear me out..."
A student who attended Ava and Maggie's class and has an odd interest in Maggie. Little is known about Odin aside from the fact that he hails from a different planet than Maggie and Ava. His age is rather nebulous at best, as he is stated to be the same age as the others yet looks far older. At the start of the story, Odin tries to convince Maggie to leave the planet with him, and insists that she is in danger from something.
Agent Scully: Seems to really enjoy poking holes in the logic of TITAN's existence and power.
Jerk with a Heart of Gold: Possibly. In spite of what Maggie says, Odin has so far treated both her and Ava nicer than they treat him, certainly better than they so far deserve. It's unknown whether his dislike of Gil comes from him being a TITAN worshipper or Gil being Gil.
Stalker with a Crush: At least in Maggie's opinion. It's unclear to what extent Odin pursues her, but she has complained more than once to the school administration.
The Stoic: Odin is hardly fazed by anything, no matter how grim the situation seems. His facial expression is one of perpetual seriousness, and he rarely has any emotional outbursts.
The Stoner: With his beard, pipe and stoicism, Odin gives off this vibe. It could also explain why he looks older than everyone else and his red pupils.
Stutter Stop: Odin usually speaks with a significant stutter but when Maggie nearly kills Odin by hijacking and crashing his ship, his speaking abilities suddenly improve (although the stutter is still present).
Technicolor Eyes: His pupils are red. It's currently unknown whether the effect is artistic or noticeable in-universe but it doesn't appear to be genetic; his sisters don't have it.
Vague Age: He's stated to be 16, though even Ava comments that he doesn't look it.
"What kind of doctor would I be if I just left them to die?"
A blue skinned boy from another planet and an aspiring doctor. Close friends with Nevy Nervine and has promised to ask TITAN a very important question on her behalf. He seems to be kind-hearted and perfectly willing to help others at his own expense. Reveres TITAN as a sort of leader/god.
Meaningful Name: His last name, Marverde is made of the Spanish words 'mar', meaning "sea", and verde, meaning "green". The ocean on the planet that he's from is green. Also, his life was defined by something happening to him while he was swimming, which he seems to have enjoyed doing regularly, so his first name takes on obvious meaning.
The Medic: He wants to join TITAN's army as a doctor and is moderately skilled already.
Nice Guy: He takes in 3 strangers who crash-landed in his yard and could be criminals for all he knew and nurses them back to health, no questions asked.
Obliviously Evil: Nice or not, Gil also has a tendency to inadvertently insult those who don't share his faith in TITAN. He calls Maggie "ignorant" for not knowing TITAN's history and when Ava asks if there's a way back from Paradise, Gil dismisses it as "a stupid question." Goes further when Odin and Nevy speculate that TITAN's just using his followers.
Uncertain Doom: Is she alive? Is she dead? Has she turned into a "demon?" It's Tuls' job to find out.
"If you hadn't ignored me you would know how important I am to this current universe! I have UNFINISHED FUCKING BUSINESS that will never be taken care of!"
The eponymous Demon herself. Not much can be said about her back-story without spoiling, but suffice to say that she is/was very powerful and considers herself a higher being than others, which may not be so far from the truth. She has been tied to Ava from the day Ava was born and had taken it upon herself to makes her life as miserable as possible with semi-good reasons. Hates TITAN with a passion.
My Death Is Just the Beginning: Tries to enact this against TITAN to ensure that she, Pedri and her strongest warriors have the chance to die free and to acquire reinforcements in the form of Lifeform Hosts. She is pissed when she finds out she is attached to Ava.
Nice Job Breaking It, Hero: Ruining Ava and Maggie's friendship means Ava is isn't very confident about recruiting Maggie, who isn't known for her forgiveness, for the anti-TITAN army.
"You can't be this nice to strangers, Gil. You're gonna get hurt."
Next to nothing is known about Nevy's past, which is due to her full-blown amnesia. She is bubbly and good friends with Gil, who she wants to keep out of harms way. At times, she seems very possessive of Gil and is prone to being jealous of people he gives attention to. Nevy desires to ask TITAN about her past after she heard that he is omniscient, and desperately wants to learn the truth about herself and who she is.
Bubble Gun: Frequently seen blowing bubbles or making bubble animals. In this scene she's making fish.
Identity Amnesia: It appears as though Nevy has trouble remembering her past, even though she knows her own name (she thinks her name is Nevy, anyway) and feels as though her home and life were taken from her. We don't know precisely what caused it, but it may have something to do with Wrathia's 'cursed wine'. Nevy is, after all, a demon, and this page has Wrathia filling a bottle that matches Nevy's colour scheme and maritime themes.
Nevy: But what life? Why can't I remember? I wish my head would stop swirling.
Making a Splash: Not shown in-story yet, but heavily implied with her oceanic appearance and bubble-making powers.
Meaningful Name: "Nevy" is an anagram for "Envy". It's also very close to 'Navy', which is a shade of blue (her hair is blue, but not navy blue specifically), and ties into her associations with water.
Killer Rabbit: Ava notes he doesn't seem nearly as frightening as Wrathia or even his Host, Maggie. That said, he's a person that Wrathia approves of, under ideal circumstances anyway. But he can pull off a rather menacing look.
Not much is known about the entity called "TITAN". He was able to conquer Wrathia's empire of multiple galaxies in the span of a day, and his name is always written in caps. Most likely in charge of TITAN Inc., the company which established Ava's re-education planet. TITAN is rumored to be "all-knowing", although this is likely propaganda spread by TITAN Inc. His forces are said to consist of a "massive army of "followers"", but it is unknown if all of them are willing participants in TITAN's galactic conquest.
Strange and violent creatures who attacked and destroyed Ava's home planet. Their race seems to have control of powerful technology, as demonstrated by the robots used to attack Ava's homeworld, and their capability to destroy an entire planet in a relatively short time span. Odin and his brother seem to have some knowledge and possible past experience with these creatures, although to what extent is unknown. Odin was fortuitously warned by his brother about the impending Silent Scavenger invasion, and is able to escape the planet, along with Maggie and Ava. The Silent Scavenger's motives and allegiance are currently unknown, although they did attack a TITAN-made planet, which could be of significance.
Aliens Are Bastards: Their only appearance involves destruction to planet and the presumed death of all involved.