I chose Ellen Page from Juno during a major creative slump. I had recently watched the movie and thought it might be highly amusing to write the character Juno as a Jedi Padawan for the sensational reactions being pregnant and young would elicit.
So, I used quite a bit of Juno and to a point, I still do. Slang, quirks, sense of humor, and a certain amount of constipated respect, both figurative and literal at times. >_> Pregnancy is ever unforgiving on the body.
I recently, however, decided to change faces. Felt that I needed something of a more mature look for Avalore, but one that still maintained evident youth. I switched to Jennifer Lawrence ala Hunger Games / Silver Linings look. I may or may not take bits and pieces from those certain characters as Ava continues to age and after she gives birth, depending upon what decisions are made per her situation. But this character has been and always will be one of those that I freely allow the tides of story to mold and change.