Sure, you can build a custom character in 3D Dot Game Heroes brick by brick, but if you want to jump in the game there are a dozen prebuilt heroes to choose from.
Seriously, dozens. Samurais, kings, funky Santa Claus, and a bunch of Tenchu cameos are on the 3D Dot Game Heroes disc. Here are snapshots of all the heroes you can start with.
The Japanese version which came out in November had three characters: Frum, Sonya, and Atlus (the scholar). Custom character data from the Japanese version is compatible too. I tried it and loaded all of the custom characters I made in the build Atlus sent us.
3D Dot Game Heroes comes out on May 11. I’ll see if I can find some awesome models to share on the site before the game launches.