Are you making a corset to wear under the costume, or as the dress? I know nothing about this character, but from a quick google search she appears to be wearing more a structured mini dress than a corset.
Anywho! If a corset is still what you want to make, if you have any draping experience you can easily drape a corset pattern. Just research some images of corsets to figure out where to put the seams, and how many panels you want.
If you want to use a pattern, this is a pretty basic one you can alter:
I would just extend the panels to length you want. If you want to have a busk in the front, just cut the CF piece in half. Be sure to add enough seam allowance to be able to insert the two sides of the busk.
If you google corset supplies you'll find a lot of different websites where you can buy the specialty materials you're going to need.
As far as tips and tricks:
-Definitely use at least one layer of cotton coutil. I use it as the layer closest to the body. It's made specifically for making corsets and gives them that essential rigidness. It also keeps your grommets from ripping out of your fabric.
-I use spiral steel boning in all of my corsets. It's the most comfortable to wear and the easiest to move in. Sometimes I'll use regular steel boning for the CF or CB, but all the rest is spiral.
-When cutting your boning, leave about 1/2 to 3/4 of an inch between both ends of your boning and where the finished edge of the corset will be. If it's too close, overtime it could poke through the fabric.
-Make sure you think about how you want to finish your edges before you cut out your fabric. Are you going to bind it with bias tape? Serge and hem?
Also, here's a page with a ton of helpful corset tutorials. http://www.sewcurvy.com/corsetmakingtutorials.html
I hope this helps! And good luck!