My personal method tends to be a bit more... mechanical. I sort of 'logic' it out where I think about "what" the character would do in a situation. In my head it sounds dry and boring, but it works as a baseline. I figure out my plan, and how the character would respond, and then I start putting it into actual writing with more embellishment, and then it just kinda flows from there.

After I figure out what they would do and how they would react as a base level, the rest comes more easily and naturally and then their personality really starts to burst free.


Also theme songs. Theme songs are good.