Yesod is the blunt, no-nonsense leader of Lobotomy's Information Team. Being prepared is second nature to him, and any plan that he advocates for will always be based on reason instead of emotion. Working at Lobotomy has given him a sense that accidents happen regularly, and that leadership doesn't mean showing empathy or remorse for the fallout, but learning from and adapting to prevent these in the first place. Don't challenge him on that unless you're ready for a sharp-toothed response. Due to this, the other team leads are less likely to directly confront him. Despite that, he sees his job as a duty and not a point of pride.

Yesod is a character that can have a variety of voice profiles, so long as they convey his formal and analytical personality. Anyone with a deeper voice will have an easier time taking this named role than others. But as long as the performance isn't a generic nerd voice, any pitch can work.