[quote=@Kho]
This was pretty helpful in fleshing out Seihdhara a bit (not all the questions were relevant, but the ones that were were) - http://creativewritingguild.com/exercise/fleshy-character-questionnaire/
[/quote]

I actually have a few of these, even a whole book on the topic that I bought but never read. Yet that one in specific asks some questions in an interesting way, I will keep it in mind.