I think you'd do good with a cross breed between choice 2 and 3.

Character Name: Lucia R. Violetta (Alias, Real Name Unknown)

Age: Physically 16, Actual Age Unknown, Claims to be "At least 100".

Appearance: A young teenage girl with long dark blue hair and sapphire eyes. Typically wears a top hat and a blue-black ballroom dress. For more casual dress, she wears a simple tuxedo and vest. She carries around a large bag that she uses to carry her evidence, notes, etc. and keeps her most important files in her top hat. She always has a bottle of cyanide pills on-hand, in case she "needs to die quickly".

Backstory: Long ago, Lucia was involved in several bizarre experiments known as "The Prometheus Project". During these experiments, a terrible accident occurred, and as a result, Lucia's body was given incredible regenerative abilities, making her practically immortal. However, all of the scientists and members working on the Project vanished without a trace, and the laboratory soon broke down. Now, "The Prometheus Project" is known to only a handful of people. In order to avoid those who would seek the secrets of her immortality, Lucia changed her name and image every few years and moved from place to place, developing an interest i crime-solving.
She eventually found her way to the SIA and joined out of pure boredom.

Reasoning and Personality: A rather apathetic young girl who cares little for her own safety or well-being. While she typically appears cool and collected on the outside, she is very playful and cruel on the inside. Due to her immortality, she has a rather cynical outlook on life and death, often killing herself repeatedly because it "helps her think". She sees crime-solving as a simple game, and looks to it as a means of passing the time.
During Logic Battles, she will attempt to break down the enemy's argument by "striking the roots to topple the tree"; In other words, destroying the basis of the enemy logic rather than confronting it head-on. She also resorts to rather "trollish" tactics such as distracting the enemy, going off topic, or pushing emotional buttons to get a response.

Skills: Not necessarily a skill, but she has incredible regenerative abilities that make her nigh immortal. She does not typically fight, however, and does not typically need to fight either. Because of her immortality, she often kills herself by jumping off of tall buildings, hanging herself, etc. since she claims it helps her think. Her callous disregard for her own safety occasionally allows her to take a more hands-on approach to crime-solving, such as by imitating a dead body for a brief period of time.

Weaknesses: Her viewpoint is a more analytical one, often ignoring factors such as emotional or irrational behavior. She is a fiercely independent girl, often spurning the advice or help of others, and usually ignores her fellow detectives. She often believes so strongly in her own viewpoints that she can be inflexible, and often lose track of her reasoning if her logic is beaten. She also hates birds.

For the record, the limits of Lucia's immortality are as such:
1. If she dies, she remains dead for at least 30 seconds before her body begins to regenerate.
2. She cannot hear, see, touch, etc. anything while dead, so she cannot kill herself in a room and have her corpse "spy" on the enemy.
3. Lucia's personality and memories remain intact no matter how many times she dies.
4. Unless moved by an outside force, Lucia cannot move at all in any way while dead.

I don't think immortality should be too big of a deal in this RP, as there probably won't be much physical fighting. I'm holding back on some other details of Lucia's past, so I can reveal them later on as we go.

Accepted. Also, added Edwards profile to the OP.

Username: Edgeworth1001
Character Name: Nathan Parker
Age: 27
Appearance: Dark brown shoes, black pants, an white shirt with small red stripes, a brown leather jacket, and sandy blonde hair
Reasoning and Personality: Parker has a sense of humor and is sarcastic at times, but he's always take his cases seriously. He take time to think about the case, and see how the clues and witnesses could be either useless or connected to the case at hand. He try to comfort stress suspects, and always cares for civilian's and detective's safety. He always carry a gun in case there's a shootout.
Skills: Nate can notice tiny details, can pick locks, uses his fists and the environment as his weapons at time
Weaknesses: Shoots at the wrong person or item at times, gets amnesia if he's drunk, can't drive a motorcycle very well
Backstory: Parker was once a best and young detective in Chicago, he'd had it all, frame, fortune, respect, everything he ever wanted. But one day, after the crime wave hit, he found his wife dead and everyone think that it was him. Under too much pressure and being followed by his fellow cops and being questioned by the press all the time, he left his job in Chicago and drove out of town. Looking for a new job, he found Slumber Investigations Agency. Without any reason why to go back to Illinois, he took the job in the agency, as he tries to climb his way back to the top again.

I guess I might join this.

.....Curse you Drey, I am the only one who gets to make Norman Jayden clones!

*Coughcoughcough* My character's probably the closest to an assistant people are going to get, Shadow. Considering he actually says he's the assistant in order to get on the crime scene. But yeah. There's at least some sort of assistant.

Oooooh, we have five. Yaaaay. =D

Yay! Now we can start Case 1!

I don't know anything about Norman Jayden. In fact, I based my character off Leonard Church from Red Vs. Blue.

...

Ah, I see. since when does having a previous addiction to painkillers make him a clone?

That was a joke.

Damn right it was. *puts away wrench*

I realize it's late to be a part of the initial crime, but I think it's about time I used this character on AAO. It's time for Kouhei to make his proper debut... he'll be interesting to write. Especially since I plan on writing his posts in first-person.

Username: GuardianDreamer

Character Name: Kouhei R. Saito

Age: Unknown, but likely about 16-19.

Appearance: Kouhei usually has a neutral, observing expression, though those that get used to him can spot his different expressions, which are rather subtle. Kouhei's hair is somewhat strange, both in style and color. He has neon-pink hair, which he claims is natural. Two strands of his hair stick up from the top of his head and curve forward so that they resemble antennae. Kouhei's hair is about shoulder-length, and he has purple eyes. Usually his hair covers his left eye. He has a slim build. From a distance, one could probably mistake him for a female, and even up-close, his androgynous features could leave his gender a mystery. Kouhei usually wears a rather traditional detective's outfit, consisting of a grey longcoat (with a purple shirt underneath it) and black jeans. Kouhei usually carries his wallet with him, as well as a strange knife that seems like an ornamental knife, not meant for fighting.

Reasoning and Personality: Kouhei can seem rather odd to other people, or at least unusually quiet at times. In truth, he often thinks about rather deep topics, contemplating the meaning of life and death, the world in general, emotions, and just about anything. He occasionally voices these thoughts as well, which can be off-putting to other people. Kouhei's sense of humor is also a bit strange, in that it can seem like he doesn't have one, but he actually can make a joke... it's just hard to tell if he's joking or being serious at times. Kouhei doesn't tend to get close to other people, but if someone shows an understanding of how he thinks or shows that they're determined to get to know him better, he can warm up to them. It's difficult to classify Kouhei as either an optimist or a pessimist, as even he's not sure which one he is. Overall, it's difficult to get him to feel emotions openly.

During Logic Battles, Kouhei is a bit strange in that he doesn't have a particular "style" that he uses. Usually though, he'll think deeply about everything that's considered, and when he DOES come up with a theory, it's hard to break. The downside to this is that he spends a lot of time on theories, so he's usually the last one to come up with a theory, unless he's notably inspired. If he has to counter a theory, he'll usually ask questions about his opponent's theory, and slowly discredit it by mentioning more likely possibilities.

Skills: As mentioned previously, Kouhei has an androgynous appearance. If needed for any reason, he can easily disguise himself as a female, and even change his voice to a convincing female voice. Also, while probably not a "skill", he's fluent in both English and Japanese, and knows the basics of some other languages as well. It's also nearly impossible to instill fear in Kouhei, so he'll willingly take on the most disturbing and creepiest of cases without even flinching. Also probably not a skill, but he's oddly well-versed in most board games that involve strategy. Also, despite his weak physical strength (see Weaknesses) he can take a surprising amount of punishment without giving up.

Weaknesses: His personality can make it difficult for other detective's to speak with him. In addition, he may spend too much time thinking, so a theory is only likely to come from him later in the investigation. Also, while he keeps it a secret, Kouhei has a very minor form of heart disease. Given that he regularly takes pills for it though, and how minor it is, it just makes him weaker than the average person in a physical fight. In addition, some witnesses may feel uneasy speaking to him, and may not wish to share information with him.

Backstory: Mostly unknown, as Kouhei usually doesn't talk about his past. What is known is that he was a Japanese citizen, who apparently excelled in his studies at school. He claims to have two sisters, though he hasn't mentioned any other family. Kouhei has said that he used to dabble in the occult, but he has never given any specifics on exactly what that means. What is known is that he's apparently studying to be a Strategist of some kind, likely a Military Strategist, and is dabbling into mysteries in order to hone his thinking skills. Which most people find rather odd, but that just makes it better for him. Kouhei joined the SIA in a rather strange way. Basically, after getting rejected due to having no experience, he followed some investigators in a certain case, and successfully managed to best them in Logic Battles and provide the most likely theory in a crime. He was hired after that.

Though most of his past is unknown, some suspect that Kouhei is actually an amnesiac. Whether or not that's true remains to be seen, and only if Kouhei feels like sharing.

Both are accepted. The crime will begin later on today, please hold on. I've been very busy lately.

EDIT: So, now can we post in the case thread with our detective arriving at the scene? I don't want to do something wrong.

It isn't insanely late to join this, right?
Username: Reyson Incarnate
Name: Giovanni Balotelli
Age: 27
Appearance: Giovanni has shoulder-length black hair that he ties back in a ponytail, as well as a bit of stubble on his chin. He is also rather tall, about 6' 6". He also wears a blue trench coat and a black short sleeved polo shirt. He rolls up the sleeves on the jacket to a little below the elbows. Beneath his coat he conceals his gun, a revolver. Balotelli wears black pants that he tucks into his boots, which go up to the knee. He also wears a watch on his right arm.
Reasoning and personality: Giovanni's deductions often require concrete evidence, and will spend most of the investigation finding evidence at the crime scene and examining it, leaving others to talk to witnesses. During times in which he must present an argument, he relies on his evidence to do the talking. He will also use the evidence to conttradict the claims of others. He is very confident in his work, and doesn't accept criticism well if there is no proof to back up the claims.
Weaknesses: Giovanni can be quite cocky at times, and also requires evidence to make accusations.
Backstory: Giovanni was born in Italy, and came over from there at the age of 14. He became very interested in the law and its upholding, and strived to be a detective since a young age.