Yatsume

Yatsume is a Lamprey Mermaid. Originally participating in the Inter-Species Cultural Exchange Exposition looking for a host, she eventually wound up sharing a residence with three other blood-sucking Liminals.

Skills & Traits

 * Cooking: Due to being the only one of the Blood Suckers to have a much more varied diet besides blood, Yatsume makes most of her meals herself. Because of this, she is a very good cook, able to make a variety of delicious foods such as liver stir-fry, European blood sausage, and liver pesto.
 * Lamprey Mermaid Physiology:

Zoological Classification
Lamprey Mermaids are a mermaid subspecies closely related to Eel Mermaids. While they are known for their preferred diet of suckling blood from other beings, Lamprey Mermaids can subsist on the same diet as conventional mermaids.

In Japanese folklore, lampreys are called "Yatsume-unagi" (八つ目鰻, "eight-eyed eels"). The name is derived from the seven external gill slits which line each side of a lamprey's head section which, along with their actual eye, makes it look like they have eight eyes on each side of their face. Folklore in some other countries include the lamprey's nostrils in the count, calling them "Nine-eyed Eels" instead.

Trivia

 * Yatsume's name is in reference to the word "Yatsumeunagi", which is Japanese for "lamprey eel".
 * Okayado states that the chapter where Yatsume, Ricchii and Mosukii first appeared in Chapter 49 was very incomplete when it was released, and as an apology, he asked fans to choose to be one of the male background characters that appeared in the chapter (that's why they all had numbers). He added them in the final release of the volume, along with fixes on the three girls: a more gyaru appearance for Mosukii + two more arms; a more shiny appearance to her skin and suit for Ricchii + some sort of eye emojis on her face; more makeup for Yatsume (lipstick, rouge, etc).