Yuki and Kurumi

1.Yuki Nonaka Yuki is a beautiful young woman with a slim yet endowed build with a far more notable big butt. She has light blue, shoulder-length hair that has a longer portion of her hair put into a braid on the left side of her face, as well as a single long strand of hair (also known in Japan as ahoge) and yellow eyes.

Yuki is usually calm and gives off a very relaxed air, and is proper of her actions. However, she displays a different side whenever she's around Basara, like being intimate and displaying loneliness.

Being a member of the Hero Clan who is sent by "the village" to watch over Mio, she is dedicated with her role, even going as far as telling Basara that she won't show mercy on killing the future Demon Lord if she makes her surroundings dangerous, even if Basara would come to hate her.

First time learning of Mio's relationship with Basara, Yuki considered her to be a hindrance to his peace. But later on, she and Mio become close friends and also rivals in love albeit the rivalry became even more intense after she started to live with Basara. Yuki often gets jealous of when Mio (or other members of the harem) get to do things with Basara that she didn't and wants to do, and normally she takes the initiative of doing them herself or having Basara make up for it later.

Because Yuki wasn't born talented, she values repetition and working hard when it comes to training as well as schoolwork. She's the type of person that believes anyone can reach her level as long as they are willing to put the work in to reach it.

2.Kurumi Nonaka Kurumi is a petite young girl who is surprisingly developed for her age with blue-violet hair tied up in a ponytail most of the time using a white scrunchy and yellow eyes just like her older sister,Kurumi is first shown to be very protective of her older sister and is also dutiful to her position as a hero. She also held no sympathy for Basara after the incident from five years ago, even calling him a traitor due to a mixture of the grief that it caused her sister, protecting the daughter of the Demon Lord, despite her being initially being close to him thinking of Basara as an older brother.

She didn't hesitate to attack Basara in their battle against one another, then even showed to be insulted after he didn't take her seriously as he used to blunt end of Brynhildr to attack her. However, after Basara saved her from falling and hearing his suffering as he slept upon being knocked out by Yuki, she realized that he was suffering most after the incident out of the three of them. Kurumi started referring to him as "Basara-oniichan" as she had done in the past.

She quickly developed a close bond with those in the Toujou Residence, but Kurumi is described as having a certain innocence, which riles up the succubus instinct in Maria into the depths of depravity becoming both a sexual plaything for her yet close friend. This close proximity, however, it also forces her to confront her long-standing feeling for Basara, which at first caused her to shyly use her spirits to simulate a muted dream for her a couple of months in a row.

Kurumi later starts to become jealous about the fact that Mio, Yuki, and later Zest were able to make a Master-Servant Pact with Basara. Then the actions of the Succubi Lucia and Shella forcibly brings these feelings to the surface by cursing her and making Basara subdue her, repeatedly. In Volume XII, she later starts to become more open and less shy about sexual interactions to where she started to do the same thing that Maria had done to her to Celis who ended up in the same situation as herself.

3.Basara Toujou Basara is a tall and slim fifteen-year-old with unkempt brown hair jutting in all directions and light green eyes. Having spent a year in the barrier alongside Chisato, his hair has grown a bit longer, as well as being taller and more muscular.Basara has been described as having a big burly build and arms.

Overall, Basara has shown to be laid-back and collected a great number of times similar to his father, but there are times when he can also lose his composure in either awkward or embarrassing situations most of the time in his daily life,displaying great shock, annoyance and even at times anger.

Due to the incident that occurred in the past, while in the Japanese Hero Village as a child, Basara suffers from frequent nightmares as a result of being forced to eliminate the remains of his friends and comrades using Banishing Shift [8]. This has also caused him to fear using his Banishing Shift again or even using Brynhildr since being kicked out of the village, however, as time passed, he has started getting over it as he used them more and more in fights against dangerous enemies.

He is also compassionate and is a firm believer in the idea of family, desiring to protect those closest to him no matter the cost, even if it puts himself in the most danger, which goes along with his sense of right and wrong. Despite him being a former Hero, Basara still decided to protect the daughter of the previous Demon Lord after hearing about her difficult past and situation from Jin Toujou, as well as knowing Mio Naruse hadn't done anything wrong, to begin with. This has even led to him fighting against his former childhood friends to defend her.

Due to the nature of the Master-Servant Contract, Basara never desired to have his relationship with Mio forced and based on that alone, due to him wanting them to become a real family. Shiba has described him as being "too greedy," desiring to protect everything important to him and going to such extreme lengths like making a deal with Lars to watch Zolgear's death, as well as killing Belphegor, one of the Cardinal Sins before his match in secret on both occasions. Basara has a habit of restraining himself with the girls during their "conquests", but after his interactions with Chisato Hasegawa, he has started to become more and more sadistic.

Despite showing to be calm most of the time, there are moments when he goes into a frenzied state if anyone he cares about could be killed in the process as shown when he thought that Shiba had killed everyone important to him using Kouryuu. Much like his father Basara isn't afraid of going against the Hero clan and even against gods themselves in order to protect his beloved.

Aside from just his sheer combat skills, Basara has also shown to be calm and analytical using whatever means possible to make a situation go in their favor during political situations, which is mostly shown during the battle against the Demon Lord and Moderate Factions when he killed Belphegor before his match started, then he also planned to kill the other Council Members during the chaos caused by the arrival of both Chaos and the other Heroic Spirits. Then during the conflict caused by the Hero Clan who viewed him and the others as too much of a threat, decided to control the corruption level that the heroes had with the spirits and gods to his advantage.

at the public pool