Peter Dalton
Peter Anthony Dalton was a male Human who supposedly worked for the Trickster, who he believed to be an angel. Presumably at the Trickster's request, Peter seduced Sarah Jane Smith. They met at a shop and then they began dating, though Sarah Jane 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 to Sarah Jane and their wedding was set for two weeks time. The Doctor knew about the Trickster's 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)
