He had planned to propose to Vilma before the spa came under attack from Dregs. He later got separated from Vilma and was captured by the Dregs who took him outside of the spa.
When going outside of the spa in Nevi's van with the Thirteenth Doctor, Graham O'Brien, Ryan Sinclair, Yasmin Khan, Bella, Kane, Nevi and Sylas to look for Benni, Vilma heard Benni's voice outside the van with the Dregs. Benni asks Vilma if she would marry him, which she accepted. Benni then asked for someone to shoot him. Kane left the van and shot at the Dregs as she and the others fled. Kane later revealed to Vilma that she had shot Benni, much to Vilma's sadness. (TV: Orphan 55)