I present an approach and case studies for humanizing robots through accessible design. Humanizing social robots is a central goal of human-robot interaction research and often involves a combination of two objectives: humanizing the mind through human-like intelligence, or humanizing the body through lifelike humanoid features. However, these literal approaches to humanizing pose technological and social challenges that have prevented adoption of robots in everyday social contexts. Even if convincingly humanized robots could be achieved, human-robot interaction may risk diminishing our capacity for human-human interaction. I propose to avoid these pitfalls by humanizing the robot as a medium for communication through accessibility. Accessibility can humanize technologies by makings their inner workings visible and familiar to human users, promoting understanding of the technological processes and imperfections. Accessibility also enables broader demographics of lay users to become involved with robotics, enabling communication through robots, from development processes to applications. I use the open-source Blossom social robot as an extended case study of this approach, and detail its technical implementations and research deployments. The goal of this work is to present accessibility as a way to humanize robots while enabling robot-mediated communication for human-human interaction.