The character Marcas Brickley is played by Sean McLoughlin, better known as the YouTuber Jacksepticeye. During his playthrough of Chapter 2 where the videotape featuring Marcas appears, McLoughlin revealed various details about getting into the character and recording his part. The video was recorded months before the chapter's release and required him to record in a place that resembled an office, something that took him "ages" to find and required audio treatment due to the room not having sound padding. To match the color scheme of Playtime Co., McLoughlin was required to wear a yellow shirt, with the lanyard the character wears being made from scratch by combining a lanyard, a piece of paper printed with a fake barcode, his character's name, and the Playtime Co. logo, which he found on Poppy Playtime's merchandise website. Additionally, at the end of the video tape, Leith Pierre asks Marcas to bring him a cup of coffee; while unconfirmed, this may be a reference to McLoughlin's coffee company, Top of the Mornin' Coffee. During his playthrough of Chapter 3, McLoughlin revealed that he had been asked to reprise his role, but was unable to due to scheduling conflicts.