Arya's kind of difficult since she doesn't actually do much in the series, and her potential roles of being the sheepdog and the people's champions are already covered by Eragon and Roran above. I could also have her be a foil to Eragon by having her take a more aggressive approach, but Nasuada already has that part down as well. I'm honestly drawing a blank on this one.

Angela's a fun one to fix since she's so flawed, and I love flawed characters if they're done right. Make Angela the creative one, the person who makes weird connections. She's a witch, witches are supposed to be tricky. Keep her quirky, but less "lol random", more "makes weird connections". Starts going off on cuckoo birds and then mentions using a decoy. She's not honorable, but she's also not cruel.