Cornwall "Corina" Stirling (no. 3020) is Emily and Hanna's stepmother, and Olivia's mother. After Sally Stirling's death, Patrick married his wife's good friend Corina, a month after Sally's death. Two years later, in 1995, Olivia was born, and is Emily and Hanna's step-sister. When Emily heard of the truth, she was angry about it and did not respect Corina as her mother, but after a mishap, she felt sorry and the Stirling Family is happy again. Corina is based off the LNWR 3020 2-2-2 Cornwall.