Toby Fox, the developer of Undertale and Deltarune, is known to act out chapters of their game to the rest of the team like "a live radio drama," according to one of the devs working on the project.
As highlighted by the Twitter user below, in the latest Undertale/Deltarune newsletter, more specifically in the developer interview portion of the update, one of the developers known as Chess (referred to as "a career streamer & hobby game dev who's been acting as a sort of 'Toby's Little Helper' since late in Undertale's development") revealed one of their fun memories working with Toby.
