Calk Fen served as an accountant for Jabba the Hutt, and was a male. His duties included the upkeep of Han Solo's debt record after the Battle of Yavin. Initially at 224,190 credits, the debt grew to exceed 1.5 million over a period of three years. Fen advised Jabba to abandon the pursuit of Solo and instead prioritize acquiring the Millennium Falcon; he also proposed that Boba Fett's bonus be doubled.