Masaaki Yuasa
The episode also guest stars "Regular Show" storyboard artist Minty Lewis as the caterpillar Erin. Lewis has had limited experience with voice acting (she plays the role of Eileen on "Regular Show"), but in an interview with Newsarama, she expressed her surprise at being asked to voice a character for "Food Chain": "Having never done any voice acting besides "Regular Show", I was very surprised to get a call asking me to do a voice on "Adventure Time"." Lewis and the other cast members of "Adventure Time" recorded their lines with coaching from Yuasa, his translator, and the director. Unusually, the storyboard for "Food Chain" had been drawn and written out in a vertical, rather than horizontal format, as is common in the anime industry. In addition, the storyboard had been entirely written out in Japanese and then translated into English. Minty noted that "it seemed like [the producers of "Adventure Time"] put a lot of trust in Masaaki Yuasa to make something amazing without really understanding what he was doing until he was done."