Sei Shōnagon
Sei Shōnagon, author of "The Pillow Book", had been in service as lady-in-waiting to Teishi when Shōshi came to court; it is possible that Murasaki was invited to Shōshi's court as a rival to Shōnagon. Teishi died in 1001, before Murasaki entered service with Shōshi, so the two writers were not there concurrently, but Murasaki, who wrote about Shōnagon in her diary, certainly knew of her, and to an extent was influenced by her. Shōnagon's "The Pillow Book" may have been commissioned as a type of propaganda to highlight Teishi's court, known for its educated ladies-in-waiting. Japanese literature scholar Joshua Mostow believes Michinaga provided Murasaki to Shōshi as an equally or better educated woman, so as to showcase Shōshi's court in a similar manner.