[Misc: Help] I write a story about reborn but need help

[Damage]

I don't know how many people see or read the non-canon story I've been working on but I've hit a bit of a writer's block in the worst way. The work has been more for my skill develop than any entertainment purpose but I treat it like any work I've worked on or even sold. (btw a lot of you on here should sell, television and web development would love your stuff) The problem is trying to stay true to characters. One case I was called out on forever ago was Julia and making her way too relaxed and goofy. Downside of trying to write characters like her is she has less than 30 lines (or one hour) in a game spanning roughly 40 hours. So the big question is stay true to a character and abide by restrictions since I'm using someone else's work for fan-fic or add what I see fit (within reason) in order to make a story that I think everyone would enjoy.

WWAD?- the "A" can be Arceus or Ame whoever you decide.