A sharp, slightly sociopathic train inspector assigned to oversee Sébastien's last routine run. She is determined to block his transfer, acting as a primary source of control and tension throughout the journey.
Madeleine holds professional authority over Sébastien during his mandatory final train journey.
Madeleine's past decisions indirectly fuel Simon's hostility toward Sébastien.
Madeleine's professional duty requires her to monitor and control passenger behavior.
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