Morris has narrated a number of audiobooks, a few of which have earned her AudioFile magazine's Earphones Awards, the first was for the young adult novel Dear Zoe by Philip Beard in 2004. Other Earphone Award-winning titles include Salt to the Sea by Ruta Sepetys, Pip Bartlett's Guide to Magical Creatures by Jackson Pearce, and The Tapper Twins Go To War (With Each Other) by Geoff Rodkey. The audiobook The Elegance of the Hedgehog by Muriel Barbery, where Morris voiced the 12-year-old Paloma, won AudioFile's Best Audiobook of the Year and Publishers Weekly's Listen Up Award. Her narration of children's book A Snicker of Magic by Natalie Lloyd received a nomination at the 2015 Audie Awards and received the Honor Recording Odyssey Award from the American Library Association. Morris said that she has worked on many audio books for Simon and Schuster's Books For Young Readers series, where she would record at her studio in Los Angeles and would be patched over by phone line to her producer/director in New York.

In 2011, she voiced the title character Totoria, an Alchemist, in the role-playing video game Atelier Totori: The Adventurer of Arland. Gadget Review, in reviewing the game, said that normally they would ignore the English dub adaptation for a Japanese game, but liked the English voice actors, calling them full of emotion and "always delivering their lines the way you think they should". The reviewer from The Otaku's Study found the English voice-acting for the female characters to be strong, and that she "portrayed the innocent character role effectively." Travis Bruno of Capsule Computers in Australia said that the dub "continues to impress". Morris would reprise her character in Atelier Meruru: The Apprentice of Arland, where Totori was Meruru's mentor.

In Xenoblade Chronicles X, she voices Lin Lee Koo, one of the main characters in the story. She auditioned and won the role despite the only direction she was originally given was that the video game involved "space travel". Morris sought to preserve Lin's characteristics as strong female figure in her portrayal, describing her as "super smart and very self-reliant... She can cook dinner and also kick your ass." Morris's take on the character did however include using a deeper, older-sounding voice for Lin, partially to accommodate for the age change, and partially because it was believed that Western audiences would find the high-pitched Japanese version "grating". She voiced between 1,600 and 1,800 lines of dialogue for Lin – above average for a video game. In response to a controversy over Lin's bikini costumes being more covered up in the North American and European versions, Morris said that it bothered her that Lin was only 13 years old, but sees the censorship more as localization and that it would make the game open up to a wider audience.

Morris married Songwriter and Producer Steve Shebby on February 13, 2016. They live in the Los Angeles area.

In the fantasy role-playing video game Bravely Default she plays main party character Edea Lee, who she describes as a "tiny, spunky, badass warrior." and likened her to herself if she were placed in a medieval setting. She reprised her character in Bravely Second. Jason Hidalgo of Reno Gazette-Journal found the English dub to be hit or miss, but "thoroughly enjoyed Edea’s hilarious 'Mrgrgr' commentary."