/ic/ - Artwork/Critique

Are there any resources out there that explain the logic of character design? I'm not looking for an entire course so much as just a list of fundamental concepts to keep in mind while designing a character. Or a logical order of how to think when designing said character; a process or even just a book to reference.

I'm a total beginner. Here I have my most recent attempt. She's supposed to be a slutty monk warrior widow. I'm not really happy with the design in the end because the silhouette is bland and i feel like she just lacks personality overall.