Stewart

Stewart is an NPC that was revealed in this tweet: https://twitter.com/TypicalDevelops/status/1490668403740262405 Stewart is one of the Shopkeepers in Hardware Haven, he is a rather eccentric guy who can sell items to the player. In order to purchase an item you need to place it on the counter at the checkout and then interact with Stewart to confirm your purchase.

A picture of Stewart when he was first revealed, and as of this text: