Holly Lisle is a full-time fiction writer with 32 published books. You would expect her to have excellent character building tips, and she doesn’t disappoint. Her advice.
The page has character building tips for different genres of fiction writing along with flat and round character creation, naming fictional characters and so on. 
Suite 101 has various lessons on the art and craft of fiction writing. This page has good tips for Fantasy, Science Fiction, and Animal characters for writers of Children’s books.
Randy Ingermanson has 6 published books and is a writing mentor for many young fiction writers. Great advice by him on how to go about character building.
If you could talk to your characters, these are the questions you will want to ask. Great tips to help you bring your characters to life.
Charlotte Dillon is a writer of Romance books with many published books. She has a great website with impressive advice on building super characters.
Lillie Ammann is another romance writer with a superb website on fiction writing. On her character building page, she gives you a point-wise strategy to building memorable characters. Go through all the six articles for full benefit.
This is an excellent article on the most memorable characters in the history of writing. James Wood talks about the things that made those characters immortal. He challenges many stereotypes concerning fictional characters that have become engraved in our minds. A must read.
Although it has a sexist name, the site has some great character building advice. Read this article on what are the traits that make readers care about fictional characters, and while you’re at it, leave them a flaming comment about the name of the blog.
In this great list, npr.com has compiled the names of 100 best characters ever created in fiction writing (according to them), and the books they were featured in. Got your own favorite character? Find out if it’s in the list.
Shruti,
Thank you for including my blog in this wonderful list of resources on fictional character creation.
The link from this article brought me to your site, and I can’t believe I haven’t discovered it before. I will be back!
Thank you so much for visiting, Lillie. It’s always a pleasure to interact with fiction writers.
Hi! I was surfing and found your blog post… nice! I love your blog.
Cheers! Sandra. R.