I know build a character is very complex. How difficult was build a personality to them or they made their own personality?

For some weird reason, two of them were very easy to create. Even though I had to do tons of research to make them credible enough.
Neil and Will were the easy ones. Sera and Tori on the other hand had been a very long process. Just imagine I’ve been developing this entire story since 2011 and just now I have the confidence that at least all of them have their own personalities and most of them do things I didn’t plan!

Still, I have so much fun creating characters~