Ralph appears to be an older member of the Military Police Brigade's First Interior Squad. He has short, light-colored hair with a goatee and notable wrinkles.
Like most Military Police, Ralph looked down upon those from the Survey Corps; laughing to himself as his companion, Djel Sannes, blatantly insulted them for their efforts. However, in contrast to his companion, Ralph may not be as devoted to the king and keeping the security of the Walls, as he ended up going along with the Survey Corps' plans in compensation for his own life, ultimately betraying the secrets of his companions and organization. As a part of the First Interior Squad, his job was to dispose of people viewed as threats, such as brutally assisting with the murder of Minister Nick. A younger Ralph is once seen seemingly encouraging Sannes to go through with torturing a teacher, showing that he is capable of quite a degree of cruelty as well.
After receiving word that Minister Nick from the Church of the Walls has divulged valuable secrets to the Survey Corps, Ralph and Sannes are ordered to find out how much he told. Visiting the man, Ralph savagely beats and tortures Nick. Despite his best efforts; however, Nick refuses to talk and eventually dies without saying anything.
Ralph and his companion cover up the torture by claiming that Nick was killed during a burglary gone wrong. When Nick's friend Hange Zoë attempts to investigate, the two refuse to allow her entry, claiming she will interfere with the crime scene.
Ralph and Sannes are later seen being led to the location of where Eren and Historia are being held by Dimo Reeves on a horse carriage, unaware that he had been falsely mislead information to be betrayed. According to plan, the horse slips and the carriage, along with Sannes and his partner, falls into the deep trench below them. It is shown that Hange and Levi caught Sannes and Ralph before they fell to their deaths, and brought their unconscious bodies back to their hideout.
Sometime after his capture, Hange and Levi take Ralph to a stairwell in the cabin and force him to read aloud a script that they have written for him. The script has Ralph openly criticize Sannes for his blind loyalty to the king, and ask the Scouts to kill him as he is a nuisance to his fellow policemen.
Ralph's captors eventually reunite him with Sannes, placing them in a cell together. Glad to finally see his friend again, Ralph tries to check on Sannes' wounds but Sannes begins choking him, accusing Ralph of betraying him. Hange stops Sannes, revealing to Sannes and Ralph that she and Moblit forced Ralph to read a script outside of Sannes' cell to break Sannes, and get him to answer their questions. Sannes is devastated, and Ralph angrily calls Hange a monster.
- Djel Sannes - Ralph's companion and friend, the pair were always seen together and appeared to be close prior to being captured by Hange and Levi. While a hostage, he ends up insulting him, claiming to not care about his injured condition and asking for him to be killed, however that was possibly never Ralph's true feelings, as he was being forced to read from a script.