Today is Writing Wednesday. So let's talk about the art of writing, and let's specifically talk about those pesky characters that inhabit the settings you've created. 
I received a call from my sister last night. She is also a writer and has her own blog right HERE. You should visit her some time and tell her I sent you. She does write some darned good posts over there. But, back to our conversation, which actually turned out to be the basis for this post. The phone call went something like this: 
"Are you characters real?" she asked.
"Well, they're real to me."
"Yes. They seem real to me, too," she replied."But what makes them real?"
"What do you mean?"
"I mean, some of the characters in the stories I read just don't seem real. Others do. I'm wondering if the author writes them in such a way that they don't seem real. I mean, does the author do that on purpose?"
I didn't have an answer for her. We talked for a while about it, and the name of Neil Gaiman came up along with the button-eyed-other-mother in Coraline. This character seemed very two-dimensional and not very "real" to me when I met her—at least not real in the same sense that Coraline seemed real. 
After giving it a bit more thought, I felt confident that, with Neil's writing talent, he must have created those not-so-real images intentionally. But, I wasn't 100% certain of that. Perhaps, if Neil reads this blog, he can answer that question personally for us. If you know Neil, please ask him to visit us and leave a comment with the answer we're looking for.
Since we didn't come up with a real answer to the question, our conversation ended and we hung up. But the remnants remained in my head, and a related question started festering and pestering the back of my brain. It was simply this: How do you breathe life into a character and make them into a real person in the reader's mind? What are the ingredients of life that you need to include? I knew some research was in my immediate future before I could put it to rest. Much of the following information was gleaned from an article compiled by writing coach Jessica Morrell. I think she's done a very good job on covering some of the basic elements. In fact, her website is a wealth of information on writing. I highly recommend it. Click HERE and bookmark it for later perusal.
The suggestions below will get you started. 
1. Create characters a reader has never met before.
Bring your characters onto the stage with  pizzazz, make them memorable, solid and consistent from the first moment  they come into view—bigger than life. Whenever possible, bring  your characters to life through all the five senses. Don't be lazy and only show us what the narrator sees.
2. Ingredients of a great  character
Characters are formed from a group of traits that are  consistent and memorable. As you bring your characters to life, first  create a base of dominant and important traits. These traits will remain  consistent throughout the story and will be important to the events of  the plot. It is best to open with a scene, event, or description that  displays these traits. Our first impressions of a character should  convey one or more of his or her dominant traits. Examples of these  traits: strong, intelligent, brave, clever, self-assured, rash,  headstrong. Second, add character  tags and traits such as smoking, fidgeting, quality of voice that  complement and deepen the main traits. Third,  add more traits that reveal the complexity of your character. These are  traits that appear contradictory, but only appear after the dominant  layer is officially established.
3. Use action to reveal  character
Whenever possible, characterize through action. Show your characters  talking, debating, reaching decisions, doubting,  hesitating, or pulling  out all the stops. 
4. Larger-than-life characters 
Make  your main characters somehow extraordinary or bigger than life.  They  should stand out in crowd—although that doesn't necessarily mean  they  must be flashy, just unforgettable. Fictional characters are made  of  heroic proportions. There is generally something exaggerated or  enlarged  about who they are. They are important and memorable.  While they  can share some traits with your family members, friends, or  neighbors,  they are much more compelling and vivid. The reader must  believe that  they are unique, unusual, special, one-of-a-kind.
5. Showing off your characters
Luckily for fiction writers, techniques for revealing character are   many. Characters are portrayed via exposition, description, narration   and action. Characters are portrayed by conflict with their environment,   conflict with other characters, action, self-discovery,   self-realization, and change. Dialogue tags  can reveal character  including physical traits, appearance, mannerisms,  habits, expressions  and gestures. You can also reveal a character  through a self-portrait  or confession, anecdotes, dialogue, tastes,  interests, possessions,  setting, the opinion of others, thoughts,  introspection and decisions. (You might want to visit THIS POST regarding dialogue and vocabulary.)
 
6. Creating emotional impact
In Practical Tips for Writing Popular Fiction, Robin Carr gives  the following advice on creating emotional impact via characterization:
 
'...but they are still just people on the page   until your reader relates or understands or believes, or all three. This   relationship between reader and character is an emotional experience. Delivering   emotion is a tall order. And, it's not just learning to write about   emotionally charged situations or learning to describe emotions. It   means creating the EXACTLY RIGHT emotions for the particular happening.   Sometimes they are subtle. Sometimes a slow tear traveling down a dusty   cheek can cause a wrenching in the gut even more succinctly than   screaming rage. For this, the writer must know himself well...' 
Carr goes on to recommend that a writer read a   novel with the sole purpose of picking up emotional connections. She   suggests that as you read you learn to recognize an emotional response   in yourself. You may also want to analyze exactly how the  writer  brought about the reaction.
So there you have what my quick research discovered. I'm certain there  is a lot more info out there and other great suggestions and things to  keep in mind that will help breathe life into your characters. Feel free  to leave a comment on anything that's worked for you in your writing.