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
Her hair is 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 in 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.
 * "Power Loss": If her head and body are separated, she claims that she cannot use her powers.

Possessions

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

Plot
After revealing her self 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 the Lala is the writer of the more poetic message.