Oliver Vaquer and Jennifer Hale voiced Robert and Rosalind respectively. According to Vaquer, he was initially told that the audition was for a project codenamed Icarus, and that he was only informed after having secured the role that it was for a BioShock game, a series which Vaquer claims to be intimately familiar with. He recalled that the lines for the audition was for both characters, but auditionees were to deliver them as "one conversation, one person" with a British accent. Both actors recorded their dialogue at the same time and location, which Hale noted is a rarity for actors in the video game industry. Hale said that it is essential for her to be well-prepared whenever she commences a recording session, as she had many factors and potential scenarios to consider beyond just recording lines from a script. Though physically separated in different booths, both actors were always within hearing distance of each other, which allowed them the opportunity to play off each other's line delivery as the characters are written to have a tendency to finish off each other's sentences. The actors had some degree of creative freedom, and were not obliged to strictly adhere to the minutiae of the game's script; according to Hale, the creative team would occasionally encourage them to ad-lib or improvise certain lines provided that there were no technical constraints. Both Vaquer and Hale had a very positive work experience with the developmental team of Infinite, and credited director Ken Levine for deftly guiding them through the recording process.