Lucy Westenra

Before getting the chance to marry, Lucy becomes Count Dracula's first English victim, and despite Seward contacting Abraham Van Helsing for help, she transforms into a vampire.

Following her return as a vampire and attacks on children—dubbed the "Bloofer Lady" by them—she is eventually cornered into her crypt by Van Helsing and her suitors who destroy her, putting her soul to rest.

In her final moments, her vampiric side emerges and nearly tries to bite Arthur, but Lucy regains her human senses and before dying asks Abraham Van Helsing to protect Holmwood.

The sweetness was turned to adamantine, heartless cruelty, and the purity to voluptuous wantonness.” She attempts to seduce her former fiancé, but Van Helsing repels her with a crucifix.

Lucy's death motivates her suitors and Mina to join forces with Van Helsing and Jonathan Harker in hunting and destroying Dracula in retaliation.

[1] Leslie Ann Minot pointed out, in a 2017 essay on Lucy Westenra and other 19th century female characters, that if Dracula is an overt portrayal of a sexualized monster then Westenra is problematic since her attacks on children would then equate to "the sweet Lucy sexually molesting toddlers"; Minot sees this as one reason why the character has received less attention than others.

[4] Stoker was well aware of these developments and was close friends with W. T. Stead, the newspaper editor who supported the SPCC, published lurid accounts of child abuse and was himself jailed for the abduction of a 13-year old girl, which he organized as a demonstration.