Origin: JTHM Issue 2, Story 1: Goblins
Canon: Edgar Vargas was chosen by Nny to feed the wall because he happened to be convenient at the time. Nny tries to find some other justification for this, but through their conversation Edgar finds out that the entire thing is mostly accidental and has nothing to do with him as a person. Edgar throughout their conversation seems rather reserved and quiet, never provoking or attacking Nny. He asks why he was chosen since he had never met Nny before. When Nny admits that he didn't want to kill Edgar since he seemed like such a nice person, Edgar relaxed and told Nny his name, thinking that maybe he'd be saved. He was incorrect because at this point he didn't know how important feeding the wall was. When Nny freaked out on him and told him that he had no choice in whether Edgar died or not, Edgar accepted that news quietly. This confused Nny. At this point, Edgar states that he's not "clouded" like Nny was and has no family and no friends, but he does have his faith. That is all he needs, and he's not afraid of death. Nny stares then says "I envy your conviction."
Then he kills Edgar.
Then he says "That did nothing for me."
Interpretation: Through Edgar's behavior throughout this entire conversation, it seems that he's a rather logical
person. He knows not to provoke or intimidate Nny and underneath his calm exterior, probably believes
that he can talk his way out of his predicament. He shows some amount of sympathy for Nny's plight,
but is still well aware of the fact that he's insane. When Nny tells Edgar his name, Edgar smiles and relaxes
and is sure he'll be saved, but realizes that Nny's feelings about him have nothing to do with whether
he dies or not.
Most curious is Edgar's reference to being completely alone. He seems to be a fairly normal guy without any outstanding features, but to be entirely without social connection is odd in itself. Why is this? Was Edgar lying to Nny to protect his family or friends, or did his religion fill any void that he had in his life? Edgar's specific religion is never actually mentioned either, other than a reference to heaven and hell. He may be Jewish, you never know.
He seems to be a rather quiet and reserved man. Even his reaction to his death was quiet acceptance, something very unique in a person. While Nny ranted and raved at him insanely about who needed to die and who had to die and who deserved to die, Edgar either disagreed or agreed respectively, knowing pretty well what he had to say and do to get Nny to like him. And Nny did like him. He just had to die eventually.
Johnny C. (Nny to his friends)
Origin: JTHM Series Main Character
Canon: Johnny, originally, was an artist of some skill before something went wrong. It's not clear what exactly caused Johnny's mental collapse, but whatever it was destroyed his talent and his mind. He lives in a house that he doesn't remember moving to and can't remember anything about his past life. He tends to have massive mood-swings, moving from one extreme to the next. Johnny tends to be suicidal often and homicidal even more so. He kills people to feed a wall in his basement that eats blood. Johnny goes through most of the series believing that he is the innocent victim of society and that he is owed some revenge, although the people he tends to kill often commit very small, insignificant crimes (not blowing your nose, wearing an ugly tie). Another favorite target of Johnny's are people who make fun of him, which he absolutely detests.
Johnny's insanity tends to take most noticable form in his figments, of which there are mainly three. There's Nailbunny, a dead baby rabbit that tends to be logical and considerate about Johnny and his feelings; Mr. Eff, a repainted pastry display that manifests as his manic, destructive side, urging Johnny to kill and enjoy what he does; and Psycho-Doughboy, Mr. Eff's also repainted twin who instead urges Johnny to commit suicide and end it all. The doughboys each have their own agendas that don't have Johnny's wellbeing at heart, but Nailbunny is very sincere.
Johnny tends to talk to himself or his voices frequently and writes in a journal he calls his "Die-ary." He has a very extensive vocabulary for a madman and rants at his victims before killing them. He also has problems with people that he likes, the best example being Devi. She asked him out and they had a great time. Johnny was perfectly happy, but his fear of other people and losing his happiness caused him to try to kill her right at the peak of their date. Devi fortunately escaped, but it shows just how fractured Johnny's interactions with others are.
Throughout the series, Johnny goes from fully reveling in his blood-lust to absolutely hating it, and makes efforts to change, however twisted they may be. He realizes that the wall has been controlling him and that he wants his life back. After a trip to Heaven and Hell (maybe), Johnny manages to survive, but without outside influence. At this point, he's determined to live his life free from emotional ties or restrictions, completely free from anything's control. However, a new figment shows up and makes things difficult. Johnny still loathes himself, but is struggling to change that.
Interpretation: Johnny, to me, seems to have connected the idea of death and love in a very peculiar way.
So frightened by the thought of change in his relationship, Johnny ends it before it has even truly
begun and shows no remorse. In fact, he's done it before, showing that Johnny had made some kind of
loving connection before Devi came along. Devi just was the one who escaped.
While Johnny is pitiable, he's still hopelessly insane and rather egomaniacal. He overreacts to things that are totally ridiculous and is convinced that he's the victim in this entire thing. His rants tend to focus on how society's mistreatment of him encourages his behavior, but later even HE realizes that this is just a thin smokescreen to hide his real motivation. As Jhonen said, Nny seems to be rather lost...in himself and in his mind.
Nny seems to overreact to things that really shouldn't affect him, rant about things that really don't matter ("I cried and cried, but no butter came! Why God Why?!"), and view everything in both a very literal sense and a very metaphorical sense at the same time, which may fuel his bizarre behavior. While with others, he tends to alternate between talking to himself and talking to his victim. He's incredibly defensive about himself, going to great lengths to defend what he does and why he does it as a noble and understanding behavior. Nny is unable to hold a steady or sane relationship with anyone because of his connection of death and love and his complete overwhelming fear of rejection. You could even think of Nny creating his voices so that he would have something that would accept him and never leave him, particularly Nailbunny.
Actions mean things to Johnny, but he doesn't explain why. Even if he seems quiet, there's a million arguments raging in his head over what he should do next. Despite what he says, he does seem to enjoy killing people, although later on he decides it's not productive.
You could think of Nny's mind as a machine, and a cog being removed. Most of it still runs, but when it gets to that same cog area, it stops. It runs over, gears break, and it runs uselessly. While most of Nny's mind seems to run without error, there's a piece of him that's very broken and fuels his psychosis. Eventually, Nny realizes this and tries to fix himself without much success.
When Nny's not in his particularly manic state, he wants to be normal. He doesn't want to be insane and kill people for no reason. He wants motivation for his actions which is one of his primary sources of frustration. It's unlikely though that Nny ever didn't like killing people. Nailbunny told him once that in his past "he still did ghoulish things, but for slightly different reasons."
Nny tends to be extremely random in his actions because most of his decisions for them are made in the span of a few seconds internally. He has an incredibly short fuse and flies off the handle often and at these points, he refuses to listen to anything or anyone.
While Nny may have the capacity to care for someone, his concept of caring is too twisted for a lasting relationship. He fears rejection so destroys the object he cares for before it rejects him. This can also interestingly be related back to his hatred for the popular, trendy people who act in certain ways. They're often targets of his who make fun of him for being different. This may relate back to his fear of rejection if one tries hard enough to make such a connection.
Canon: Scriabin's earliest incarnation shows up as soon as Chapter Two as the mocking voice in Edgar's head. Throughout the story, Scriabin grows and becomes more sentient, powerful, and emotionally complex.
Scriabin's agenda is not clear. He can argue very eloquently for one position, then change his mind and argue for another without any explanation. More than anything, his running commentary seems intended to undermine Edgar's confidence in himself and his abilities rather than to achieve any singular goal. Even if Edgar should take his advice, Scriabin will find a way to berate and criticize him for it. It's unclear whether the logical reasons he has behind whatever stance he takes are what he truly believes, or what he thinks Edgar will believe.
Scriabin's avatar is an action figure from a popular (at the time) movie titled "Zeitgeist," in which all the characters were named after composers. The three main characters were named Liszt, Satie, and Scriabin. Squee, having seen the movie and collected the toys, had a set. Edgar felt an odd attachment to the Scriabin action figure when he visited Squee. Shmee was the one who suggested that Edgar take it.
The action figure is of a tall, lanky man with reflective glasses, dressed primarily in shades of black. He has a long trenchcoat, a shirt with a white box on the front, black jeans, and shaggy dark hair.
Eventually, Scriabin is able to speak to Edgar through the toy, but mostly his conversations with his host are internal.
Interpretation: As stated before, it's unclear what exactly it is that Scriabin wants or even what he is. Although he seems to share some similarities with Edgar, he is very much his own person, and he reacts to things in completely different ways than his host. While Edgar tends to be rather passive in his interactions, Scriabin is very aggressive and determined. While his constant taunting can be done in mean-spirited humor, he can also very readily tear into Edgar without mercy if he thinks the situation calls for it. He does not care how much he hurts Edgar in the process, if hurting him isn't the goal in the first place - the ends justify the means to Scriabin.
Scriabin doesn't know nearly as much as he thinks he does, and his advice is far from flawless. He often pushes Edgar in the wrong direction or gives him bad advice, then blames Edgar for what happens. In a way, Scriabin can be remarkably immature and he absolutely hates being proven wrong. Scriabin has this incredible sense of self-importance and views Edgar and his decisions as things beneath him. Being proven wrong by something Edgar says or does can drive him crazy.
Scriabin is also not nearly as impenetrable as he presents himself. Whenever confronted with mistakes he has made or truths about himself, Scriabin immediately shifts the focus back to Edgar. He dodges the question in an active, hostile way, which Edgar has yet to really catch on to. Despite the fact that he denies that it's possible, Scriabin can be hurt in various ways. If Edgar does hurt him, Scriabin tends to react with rage.
It's very possible that Scriabin himself doesn't really know what he is, and he may be a tool for the lock system that he's not aware of. In that way, Scriabin would just be being used by some outside force and given the illusion of self-control...