User blog comment:JeloJellyJam/Let's Refurbish The Wiki!/@comment-25029082-20191009140837/@comment-25029082-20191010013425

I can put it this way - if the character has a level of development that you can catch up, you can either: a, ask the RPer to describe the current traits that the character has up to that point and use it to understand how you can use those traits to end the story or b, ask the RPer to simply end the story without regards of the development. More than likely, choice A is the best option, although B is faster.

For instance, here are two scenarios I came up with:
 * Scenario A: Lance and Tess are making a story about a character named Elmer. Elmer, who is roleplayed by Tess, goes from a normal but nervous person into a heroic figure who learns more about his past and family. Near the end of the story, Tess loses interest and allows Lance to co-own Elmer to finish the story. Lance asks Tess about the traits that Elmer should exhibit near the end of the story. Tess responds that Elmer should end up as "happy, but still fearing about his past decisions". Lance uses the information provided and attempts to end the story, mimicking Tess's provided traits to Elmer to end the story, finishing it in a way Tess prefers.
 * Scenario B: Same as above, but after Tess loans Elmer to Lance, Lance asks whether he should take regard of the traits developed at the point to finish the story quickly. Tess is fine as long the story is finished, so Lance rushes completion of the story, ignoring the development being bought up to this point. Tess's outcome isn't how she wants it, but she's happy as long the story is finished.

Of course, you don't have to be perfect when you finish a story with a developed character. Try to recall the traits up to that point and try to finish the story with what you have. Of course, contacting the original RPer might help you further.