Raeliana ends up at the Duke's mansion because she makes a deal to pretend to be the fiancée of Duke Noah Volstaire Wynknight. This arrangement is to protect herself from being killed off as she was in the original novel's plot. Raeliana, who is actually the reincarnation of Eunha Park from modern-day Seoul, uses her knowledge from the original story to negotiate this fake engagement with Noah, who also has reasons to agree. This deal helps her avoid the fate of death by poisoning from her original fiancé and keeps her safe while navigating the political and personal dangers around her.

Background and Context

Raeliana McMillan is a character from a South Korean web novel who is known to be killed off early in the original story. Eunha Park reincarnates into Raeliana's body and, aware of the fatal ending, seeks to change her fate. Realizing that the original Raeliana was supposed to die by poisoning by her fiancé Francis Brooks, Eunha adopts a strategy to avoid this.

Reason for Moving to the Duke's Mansion

Raeliana uses her insider knowledge of the novel’s plot and the political influence of Duke Noah to create a protective cover for herself. By becoming Noah’s fake fiancée, she secures a place at his mansion and gains protection from other threats, including her original fiancé who planned to kill her. Noah agrees to this arrangement partly because of Raeliana’s threat to reveal his possession of a powerful royal seal and partly out of his own interests. Over time, Noah grows genuinely fond of Raeliana.

Key Plot Elements

• Raeliana initially wakes up in Noah’s room by accident and tries to avoid him by disguising herself as a maid.
• The engagement is a front to keep Raeliana safe from assassination attempts and disputes involving her original fiancé.
• The story explores their evolving relationship amidst intrigue and danger.

In summary, Raeliana ends up at the Duke's mansion as part of a survival tactic by posing as the Duke's fiancée to avoid her original deadly fate and navigate the complex political environment around her.