Lala

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

Appearance
Lala is a young, blue skinned woman with black clothing and a black scarf. Her hair is white and long enough to cover her back with one huge strand in the shape of a scythe sticking out, though this strand strangely seems to be absent when she appears in the afterlife. Her eyes have black sclera and gold - coloured irises. Her most noticeable trait is her detachable head, which functions perfectly even when not attached to her neck. The insides of her neck, such as her esophagus and windpipe, are exposed and visible when her head is separated, allowing her to perform feats such a pouring liquid directly down her throat.

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 to keep people from believing she is an actual Psychopomp. When working she has a more positive attitude and is shown to actually prefer helping someone over doing her job.

Her relationship with Kimihito is more complicated than the other girls. Whereas many of them are trying to win his hand in marriage, Lala has no interest in the matter. However, she does tell Kimihito when he dies his soul belongs to her due to her duties as a dullahan.

Skills and Traits

 * Soul Reaping: She can travel to a different plane of existence to reap the souls of those near death, as well as return those near death to life.
 * Teleportation: She is able to cross between worlds at will and appear where she wants to, as shown when she appeared behind Kimihito as the truck passed by.
 * Headless Body: Her head is detachable, and both can live and function without the other. 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 is in fact perhaps serious that Kimihito's eventual marriage to any of his guests may result in his subsequent death.

Trivia

 * Fans theorized that "D" may be, in fact, a stalker of Kimito.DullahanProfile.png
 * 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 is not mentioned in their debut chapter, alongside Rachnera Arachnera.
 * She is the second monster girl to have weaponry (a scythe). Normally, she would not be able to carry such a weapon due to Japan's laws prohibiting civilians from carrying weapons, and is only allowed to carry her scythe because she was able to convince the Japanese government that it is simply an agricultural tool.
 * She is actually the third or fourth girl to meet Kimihito, although she doesn't appear until Chapter 22. This is due to her taking notice of Kimihito's multiple near death experiences at the beginning of the Manga.
 * Because of that, she only ever shows up when Kimihito is close to death.