This may have been discussed in the Rebels thread but after (an admittedly lazy) check I didn't see it so I thought I'd provide it. The first link is just a series of concise bios on characters, as found in the recent Entertainment Weekly issue. Some interesting stuff in there, particularly the idea that the Death Star is such a threat it unites with the Rebel Alliance groups more radical than they are really comfortable with associating with usually. Also a nice Don Quixote reference.
Character Bios
http://www.ew.com/gallery/star-wars-rogue-one-characters/2642888_jyn-erso-felicity-jones
Forest Whitaker's character is drawn from the Clone Wars and gets a developed article that is nicely done as well. His character implies some nice more mature depth about the nature of war -- something I want as a member of the pro-gritty Star Wars movies camp.
Article on Forest Whitaker's Clone Wars character
http://www.ew.com/article/2016/06/22/star-wars-rogue-one-forest-whitaker-character
And, for fun, GQ's article on the need for gritty Star Wars movies. I know the reshoots of Rogue One probably cut that out. ****.
http://www.gq.com/story/rogue-one-reshoots
Rogue One character details, includes Clone Wars character
You mean like this thread?
Waiting patiently to see the re-envisioned Jan Ors / Kyle Katarn story...
Whoops I mean Jyn Orsu / Cassian Andor story.