If you’ve played Bloodborne, you’ll remember Master Willem as the NPC that sits on a rocking chair beside Moonside Lake in Byrgenwerth. He doesn’t do much but vaguely gesture in the direction of where you fight Rom, the Vacuous Spider. But originally, Rom wasn’t the only boss planned in this area.
As discovered by modder Lance McDonald, Master Willem was once intended to be a boss himself.
By digging around in the alpha version of the game, McDonald came across items named “Fresh Livers”, which at one point were meant to be rewards for killing bosses. The item descriptions for these indicate which boss they’re tied to, and lo and behold there’s one for Master Willem himself.