Leechi

Ricchii is a Leech

Skills & Traits

 * Leech Physiology:
 * Hermaphrodite: Leeches are hermaphrodites; which means they possess both male and female genitalia (the female vagina, womb and ovaries, and the male penis and testicles (which are held within their bodies near the ovaries)). With both genitalia being fully functional, a leech can use their penis to mate with female beings and impregnate them or use their vagina to mate with male beings and become impregnated. Of course, it can also be assumed that leeches are bisexual in nature due to their genitalia-makeup and do not refrain from also using their female genitalia when mating with females and their male genitalia when mating with males. It is unknown whether a leech can become impregnated from their own sperm but they can become impregnated by the sperm of other leeches.
 * Boneless Form: Due to possessing no internal skeleton, Leeches do not possess traditional humanoid arms and legs (and by extension toes and fingers), instead they possess tentacle appendages that mimic the appearance of humanoid appendages. Since they posses no bones, they wear a rubber suit with a skeletal structure inside it in order to mimic bones and appear more humanoid. While not wearing this suit, they can collapse due to having no bones. It is shown that Leeches are sometimes uncomfortable while wearing the suit and sometimes prefer to have a break from "having bones" through practising nudism.
 * Suckers: To hold their prey, Leeches possess strong suckers on the end of their appendages which ensures that their prey can not get away until the Leech is done feeding or mating.

Zoological Classification
Leeches are a pseudohuman species of invertebrate beings that have evolved to possess forms similar to humanoids. Similar to their animal counterparts, leeches are humanoid Annelids whose diet consists of feeding off of the blood of other beings. To do this, Leeches possess sharp teeth used to penetrate the skin of their prey and an anticoagulant enzyme in their saliva ensures that their prey's blood won't coagulate (dry up and solidify) while they are drinking it.

Leeches have aided medical science as far back as the ancient Greeks where they were used to aid in bloodletting. In modern times, Leeches help in procedures such as the reattachment of body parts and reconstructive and plastic surgeries and, in Germany, treating osteoarthritis.

Trivia

 * Ricchii's nipples are inverted. Inverted Nipples is a natural condition where the nipple, instead of pointing outward from the breast, is retracted into the breast. As natural as having an "inny" bellybutton or an "outy" belly button, inverted nipples tend to 'pop out' by stimulation or during pregnancy and breastfeeding. According to a study, about 10% of all nipples are inverted.
 * Ricchii is the second character in Monster Musume to possess inverted nipples; the first being Suu.
 * 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).ms; a more shiny leech + some sort of eye emojis on her face; more makeup for the lamprey girl.