Ricardo (Whatever Happened to Sarah Jane?)

Ricardo lived in a world in which Sarah Jane Smith died as child in 1964.

Biography
Due to the meddling of the Trickster, Andrea Yates's world was everchanging, and so Ricardo lived in two similar but alternate timelines; one with Maria Jackson, and one without.

Timeline with Maria Jackson
Chrissie Jackson had dumped her former boyfriend Ivan after Andrea Yates saw him snogging Lorraine Groom. Chrissie later met Ricardo and dated him. Since Ricardo didn't have as much money as Ivan, Chrissie needed a bit of extra cash, so started to work at a supermarket. Maria Jackson had already met Ricardo plenty of times. (PROSE: Whatever Happened to Sarah Jane?)

Timeline without Maria Jackson
Ricardo went to Andrea Yates' party at the day the meteorite K67 was going to hit Earth. Chrissie and Alan arrived at the party when Ricardo was already there. After talking to Andrea for a while Chrissie went to Ricardo and greeted him with a kiss. (TV: Whatever Happened to Sarah Jane?)