Indepth Character Creation for Dummies.
The Attitude Model.
There is no story without a character and there’s not character without a story. This is a basic statement for every writing that we do. One of the most important elements in a novel or short story is characterization. Our audience look for convincing, vivid characters. The most usual approach for character building is fill a character profile. 
There are 2 approaches for story creation:
First one is when you already have a setting and you want to populate  it with all sorts of different character to build a story. For example, you want to write a fantasy novel. Fantasy as a genre has its own specific traits. OR sci-fi, or some mix of both.  This is usual practice when you have some game concept that you need to develop further.
The second approach when a character appears in your imagination before the world actually is established. For example, you are in a subway and there you see am old lady with a big black package in a form of a gun. And there it is – a general concept without proper world.

Problems of such approaches:
If you start to make a very specific world, write all about culture, religion, technology, magic and other areas of world building, you can easily get stuck. The information will overwhelm you.  With characters it’s a bit different. Most of the characters have a limited lifespan and it’s easier to track their lifepaths from birth to the current moment. But when you take a godlike immortal deity that’s when things might get as complicated as with the world building.