@4Town Fan
Well, I’m more of a writer than an artist, but the way I do it is to try and build up a history for the character. People, even fictional characters, don’t just pop into existence- they’ve lived out a whole life before we were introduced to them, so I create a timeline of events in the character’s life, and try to envision how those events would shape their personality. Were they born into an upper class family, or a lower class one? Do they suffer from any debilitating physical conditions? What sort of job did they have? Do they enjoy it? Do tu eyes have some kind of goal they want to achieve? Even something as small as how many siblings they have, or whether or not their parents died early in their lives can give you a little bit more insight into the sort of person they are. To be fair, it can’t answer
every question, and you’re more than free to add on additional traits that you feel are appropriate, but stuff like that should give you a foundation to start working off of at the very least.