Tumble (Twentieth) is a protagonist of the 2015 puzzle-RPG, Protocol. Tumble is a seven year-old girl, the youngest of the twenty prisoners, and has long black hair that cascades down the entirety of her spine. She is one of the smartest prisoners, though may not seem as such due to her young age and inability to speak. Her real name is Jule Kobashigawa, and she works closely with Cove to escape their prison.
Tumble's defining feature is her long black hair that runs down her back. Other then her hair, Tumble is of Asian decent, and wears a dark red yukata with a white sash. Due to her short stature and appearance, she is often defined as "puppy dog cute": she has large, violet eyes and a small nose and mouth.
Tumble is very childish, getting excited at even the mention of candy, though mature and very adult-like when she needs to be, which is easy for her due to her inability to speak and, therefore, does not care for conversations.
Jule Kobashigawa was born on December 24, 2054 to Kazumi and Akihiro Kobashigawa. For the first three years of her life, Jule lived happily with her parents and older sister, Yukiko. She was never able to attend school, as the schools had all been closed down due to outbreaks of the fatal virus, SANI-T. When she was five, her parents caught SANI-T, and she and Yukiko were taken into custody in order to protect them from the virus.