Centorea Shianus

Centorea Shianus, also known as "Cerea", is the third resident of Kurusu's home. She is very prim and proper, referring to herself as a self-proclaimed knight.

Appearance
Cera is a fair-skinned woman with silver eyes (shown in Chapter 6), long blonde hair, which is always in a high-ponytail (a possible pun on the fact that she is half horse), and has rather large bust, possibly the biggest in the whole cast. Her most noticeable trait in her appearance is the lower horse-half of her body.

Personality
She is incredibly honorable and chivalrous, as well as unerringly loyal to Kurusu. Also, she is somewhat archaic in speech and behavior. Centaurs have strict rules about only letting one's "master" ride on their backs. Naturally, Kimihito finds this out right after he spends most of his time riding Centoria.

She does not seem to have a good grasp on Japanese culture, as she confuses certain scenes from anime/manga as Japanese tradition, including the "fated" meeting when someone runs into another with toast in their mouth.

While she usually does not show much affection, although she is in love with Kurusu like Miia and Papi. Although she isn't as sexually intimate with him as Miia and Papi, it is hinted that she wants to further her relationship with him, as when Kurusu told her and Miia to think of Suu as a child, she brefly fantasized of having had a child with him.

During Chapter 6, when the full moon appears, Centorea seemed to be able to resist its effects, but only for a brief moment. She immediately falls under its effects, and behaves in a more seductive way towards Kurusu. While under the effects of a full moon, she also tries to outright have sex with him, even willing to have sex with him while Miia and Papi join in (this result in Kurusu imagining a bizarre rape scene to appear, where he dies of having sex with each of them, as a result of them not controlling their strength due to the full moon).

She is also very protective of her self-proclaimed "master", trying to defend Kurusu from Suu when she first appears attacking people. She also has a small fondness for R.P.G..

Skills and Traits
Centorea has great speed and agility. She is able to keep up with a speeding motorcycle, and can easily carry someone on her back due to being half-horse. However, her culture has strict taboos against allowing anyone but her master to ride her. Centorea has decided Kurusu qualifies.

She is quite adept at swordplay, as well as being quite strong, being capable of slashing through several metal barrels with a dulled sword. She is also skilled with a bow and arrow; able to pin Papi to the wall with precise aim.

Centorea seems to have a rather strong amount of will power, as she is able to resist the effects of the full moon, only for a brief moment. She immediately falls under its effects and behaves in a more seductive way towards Kurusu just like Miia and Papi.

She attributes her large bust to the fact that centaur babies require a lot of nourishment.

Plot
She was given special permission to go out without a host escort to search for a "master" and accidentally runs into Kurusu in the streets while searching for her "master" (with a sword), and immediately picks him. During their conversation, a biker steals a lady's purse, to which Centorea gives chase with Kurusu on her back to assist her, after a long chase and several hijinks, they cause him to crash into some paint cans, but they crash as well. The thief tries to strike Centorea down with her own sword, but Kurusu jumps in front of her and takes the blow. He survives (due to the sword being fake), and later on at his house, Centora gains new respect for Kurusu as he is the first person to lay their life on the line for her and offers to become his servant, becoming the third resident at his house.

Trivia

 * Centorea Shianus and Meroune Lorelei are the only Monster Girls currently known to have a last name.
 * Her name is derived from her species name: "Centorea" from Centaur.
 * Centorea resembles Saber a.k.a Arturia Pendragon from Type-moon's Fate or Fate/stay night Franchise and Winry Rockbell from Fullmetal Alchemist.