Ben Kurtz is a character in Fallout: Project Brazil. He was once on the Vault-Ball team before being kicked off by Coach Bragg for not being a loyal patriot. His past is shrouded in mystery, but he was likely part of a militaristic tribe. He has dreams of the past and possibly of the future. He draws these dreams down as comic books and posters. It's possible to ask him about the posters you see in his room in the main atrium of Vault 18.