Editing Alexandra Cavill (section)

===Mr. Wilford's engineer===
Alex presents ''Snowpiercer'' with a list of supplies demanded by Mr. Wilford before he will put the trains moving again. She is later reunited with Melanie who is shocked to see that her daughter is still alive, but Alex acts coldly towards her. Alex eventually visits Melanie in the brig and explains that Wilford had saved her life, but Melanie's parents didn't want to leave and that they had thus died in [[the Freeze]]. The two bond for a moment before Alex asks about the snow that Melanie had collected and leaves in a huff at her mother's answer.

Later Melanie is called to the Engine after Layton's failed invasion where, to her surprise and pride, she discovers that Alex is the train's Engineer. Wilford orders Alex to bring the trains to a stop and decides to disconnect from ''Snowpiercer'', let the passengers die and then come back for the train. Alex is clearly hesitant at performing such a murderous act and Melanie attempts to convince her daughter not to go through with it. Alex eventually decides to follow Wilford's orders only to have the connecting mechanism explode. Melanie explains to the two how she had planted a bomb on it and reveals that Wilford had overbuilt the mechanism, something that Melanie had warned him about before and the two trains are now permanently linked. Alex is left impressed with her mother's ingenuity, laughing and acknowledging that Melanie is right, and Wilford has no choice but to start again. After some hesitation, Wilford gives Alex the order to start the trains moving again.<ref>''[[The Time of Two Engines]]''</ref>