Peter Dalton

Peter Anthony Dalton was a male Human who supposedly worked as a lawyer but was saved by the Trickster when he fell down the stairs, who he believed to be an angel. Presumably at the Trickster's request, Peter seduced Sarah Jane Smith. They met at a shop and he gave her his phone number. Sarah Jane didn't use it, but when they met again she thought that for once she could live a normal life. They began dating, though she didn't tell her family and friends. Soon, they found out and he met Sarah Jane's son, Luke and they got along well. He soon proposed while on a date to Sarah Jane and their wedding was set for two weeks later. The Doctor knew about the Trickster's evil plot and turned up before they could marry, but so did the Trickster. It was revealed that he had an accident and before he died the Trickster got his agreement. Peter and Sarah Jane had legitimately fallen in love and Peter stated it was Sarah Jane's love that gave him the strength to reject the Tricksters agreement, destroying him again. In an emotional moment Peter sacrificed his life for the love of his life and disappeared forever.(SJA: The Wedding of Sarah Jane Smith)

It is unknown whether he died, or got trapped in nothingness like Sarah Jane, Luke and later Maria. (SJA: Whatever Happened to Sarah Jane?)