Erica

Erica is a "hunter" that works for the Corsica Family and is also Delico's younger sister.

Personality
Utterly expressionless even while killing or fighting. Either extremely stoic or unfeeling. She keeps Mikhail on task and reminds him of their orders.

Background
Erica was employed by the Corsica Family to murder Twilights.

Trivia

 * It is assumed that Erica is a Twilight, although it hasn't been confirmed. Based on Dr. Theo's analysis of the massacred Twilight bodies, it was assumed their killers (Erica and Mikhail) were also Twilights and, even though Erica has no visible tags, the fact that Delico is her brother further supports the possibility of her being a Twilight.