Antonio Tulloch

 was the romantic interest and best friend of Peter Summerfield.

He met Peter while working as a slave on the planet Bastion. He was killed by Avril Fenman after attempting to leave Bastion with Peter. Due to interference by Fenman's crystal, Peter was unaware of Antonio's death and lived for a year on Legion thinking that he was still living with Antonio. The aspect that lived in Fenman made sure she died so not to taunt Peter any more. (AUDIO: The Curse of Fenman)

Peter later wanted to locate Antonio using The Epoch's technology. (AUDIO: In Living Memory) Peter later said that Antonio had died. (PROSE: Big Bang Generation)