Lala

Lala is a Dullahan revealed at the end of Chapter 22. She is the second "D", she initially denied and told them she's merely there to warn Kurusu Kimihito of his impending death.

Appearance
Lala is a young woman with black clothing and a black scarf. Her hair is long enough to cover her back with one huge strand in the shape of a scythe and she has black sclera.

Personality
She is very cold and blunt, often claiming to be an agent of Death, referring to herself as both "Death Incarnate" and "The Huntress of Death". This is from her overactive imagination.

Skills and Traits

 * Great Speed: She managed to cross the street and get behind Kimihito in the time it took for a truck to pass by her.
 * Headless Body: Her head is detachable. Further, her head and body are psychically linked, so any feeling felt by one will be reacted to by the other and vice versa.
 * "Power Loss": If her head and body are separated, she claims that she cannot use her powers.
 * Non mouth assisted consumption - Due to having a detachable head, she can apparently drink liquids without needing to swallow them, instead pouring them straight down her esophageal tube. However, this doesn't allow her to acclimate herself to the temperature of the liquid very well.

Possessions

 * Weapons:
 * Scythe: She weilds a black scythe with an indent in it.

Plot
After revealing herself to Kimihito and the others following a search for her lost head, she reveals that her species serves as form of Grim Reaper for people, arriving as a prelude to death, and in fact is perhaps, serious, that Kimihito's eventual marriage to any of his guest may result in his subsequent death.

Trivia

 * Fans theorized that "D" may be, in fact, a stalker of Kimito.
 * Another peculiar thing is the wording of the first letter itself. For some reason, "D" simply says "Marry Someone" as opposed to "Marry a Monster Girl" or something with similar connotations. This suggests that "D" simply has a problem with Kimito getting married and perhaps isn't a radical opposed to Cross-Species marriage. This helps support fan speculation that "D" may be a stalker.
 * After it was revealed that Doppel only wrote the first letter, and not the second, more poetic one, lends credence to this theory.
 * As of chapter 24, it has been revealed that Lala is the writer of the more poetic message.
 * So far in the series she is the second character who's name has not been mention in their debut chapter, alongside Rachnera Arachnera.