Krystina Arielle is the host of Star Wars: The High Republic Show, a bimonthly web series on StarWars.com and the official Star Wars YouTube channel. During the launch event for the Star Wars: The High Republic multimedia publishing project, held virtually on January 4, 2021, she was announced as the host of the then-upcoming show. The first episode debuted on January 27, 2021. In the episodes, Arielle virtually interviews authors and Lucasfilm Ltd. employees in her garage.
On July 23, 2021, Arielle moderated Lucasfilm's Publishing Panel on The High Republic at the virtual event Comic-Con@Home 2021. Her guests were authors Cavan Scott, Charles Soule, Claudia Gray, Daniel José Older, and Justina Ireland.
Arielle cameoed as a partisan fighter in the fourth, fifth, and sixth episodes of the Obi-Wan Kenobi television series although she was not credited. Costume designer Suttirat Anne Larlarb designed Arielle's costume as well as the costumes for the other members of the Hidden Path. Arielle's hair was styled by hair stylist and she also had makeup applied to make it look like she had wounds and dirt on her. While in costume, a photographer took pictures of her in the official franchise booth photo gallery. She talked with concept artist Doug Chiang and interviewed actors O'Shea Jackson Jr., Moses Ingram, and Ewan McGregor. During rehearsals in the Volume, the technology previously used in The Mandalorian television series, Arielle made sure to do her best on set and to stay quiet and focused. She described her experience as surreal and she said she was very happy to be in the show.