Rachnera Arachnera/Relationship

These are the various relationships Rachnera has or had over the series.

Kurusu Kimihito
Rachnera's first impression of Kimihito was that his caring, selfless nature was a farce, and that he was only pretending to act kind to the home-stays. When she kidnapped him to "expose" him, instead, she realized he was genuinely caring towards monster girls, even those with an outwardly frightening appearance, thus she developed feelings for him, although she tends to be less extravagant about them than the rest. This, along with her maturity and full understanding of just how dangerous extraspecies are to humans, means that Kimihito receives much less injuries from her, making her the only homestay (aside from Lala) who hasn't harmed him in any way. She was even flattered and happy to learn that he actually found her legs quite attractive and sexy (due to his leg fetish).

Ren Kunanzuki
Ren's family were the original hosts of Rachnera, and as she was lead to believe, very distrusting due to her eight-legged appearance. As revealed by Ren, during an incident where Rachnera accidently scratched the young girl, the parents sought to evict her, turning over her documents to Kasegi for a profit. This lead to Rachnera's budding distrust in humankind, though she displayed no outward aggression when the young girl showed up, hoping to take her back and prove that she could care for the Arachne.

Kasegi
When her original host family sold her to the con man "director," he abused her abilities to produce silk for selling on the black market, taking in the profits in exchange for allowing the Arachne to live with him. His taking advantage of her left Rachnera with a seething hatred of humans in general, to the point where she did not fear being deported for attacking the man, or anyone for that matter.

Kuroko Smith
As her Interspecies Coordinator, Smith was the one who set up Rachnera with her original host family, and from their first seen interaction, the MON agent did a poor job of evaluating the exchange's aftermath. When Smith came to defuse the situation when Rachnera kidnapped Kimihito, the arachne persuaded the agent to assign her to the Kimihito household, and as usual, she went along with it without Kimihito's consent.

The Racist Couple
Like how she attacked Kasegi and showed little restraint when she kidnapped Kimihito, Rachnera did not fear repercussions when she strung up the Racist Couple and their gang, even threatening the man directly when he threatened to turn her in.

Mr President
Mr President and Rachnera have an extended relationship that can be described as bad at best. Mr President values Rachnera's skills (negotiating, information collection, adaptability) and has tried more than once to get her to work for his company. On the other hand, Rachnera wants nothing to do with Mr President and hates him because all his kindness to the Liminals is ultimately based on selfish motives.

As Rachnera explains to Kimihito in Chapter 53, the Black Lily Laboratory is quite famous among Liminal species like the Arachne. After Rachnera spun Kasegi with her silk in Chapter 15, she found herself in dire straits as the M.O.N team was now after her. So she called Mr President on Kasegi's cell phone and black mailed him into making sure he could shelter her, otherwise she would make sure his brother's illegal dealings were exposed.

Mr President agreed and if Rachnera had called him in Chapter 15 he would have put her out of her predicament. In return, however, he made the condition that she would then have to work for him for six months. However, the trade never took place as Kimihito sided with Rachnera at the time, whereupon the situation with the M.O.N was clarified. For this reason, Rachnera didn't call Mr President.

After that, Mr President tried to call Rachnera several more times but she always ignored him. However, his efforts did not stop; it is revealed in Chapter 53 that Mr President sent the three dangerous Liminals (Killa, Kino and Curie) to the Kurusu house on purpose just to force Rachnera to make contact with him afterwards. To protect her friends from the potential danger of the three Liminals, Rachnera obtained the information but subsequently refused to meet with Mr President.

Rachnera didn't tell Kimihito and the other girls about her past with Mr President until Chapter 53. After the incident with Nega-Suu, Mr President again tried to persuade her to work for him, but she refused. However, when Mr President saw how happy Rachnera was with Kimihito and the other household girls, he got an idea and it is implied that he only sent Kimihito to the Black Lily Ranch so that he could put pressure on Rachnera to get her to agree to work for him.

After Rachnera learns in Chapter 57 that Mr President sent Kimihito to the ranch (although she doesn't know at that time that it's a Liminal ranch), she goes into a fit of rage in which she strangles Mr President with her spider silk. Eventually, she agrees to work for him on a temporary basis so that she can use the money to pay off Kimihito's "debts", although she makes it quite clear to Mr President how angry she was that he now has leverage against her.

Finally, however, Rachnera learns in Chapter 59 that the Black Lily ranch is run by Liminal girls and that Kimihito has to milk them too. She then strangles Mr President again and picks Kimihito up from the ranch the next day.

Miia
Much like Centorea, Miia appears to be rather distrustful of Rachnera and acknowledges her as one of her main love rivals. However, Miia does genuinely care about Rachnera as evidenced by her concern in Chapter 27 when Rachnera's original host family seeks to have her returned to their care.

As stated in Monster Musume: Monster Girls on the Job!, Rachnera tends to ignore Miia's seniority over being the first Liminal girl to arrive at Kimihito's house.

Papi
Notwithstanding Rachnera's frightening appearance and the initial reserve of their other housemates, Papi and Suu have taken a liking in the Arachne ever since she first moved into the household.

The two hold Rachnera in high regard, valuing her knowledge and the time she spends helping them with their studies to the point she has quickly become their favorite “teacher”.

Rachnera also babysits Papi and Suu on occasion, seemingly getting along with their mischief.

Centorea Shianus
Centorea greatly resents Rachnera seeing her as a contender for Kimihito’s attentions. Upon her arrival, she had suddenly become hyper-protective of Kimihito mainly due to Rachnera's previous attempt to kidnap him as well as her distinctive lascivious demeanor, something that would later on culminate in her stating her hate for the Arachne. Nevertheless, Rachnera dismissed her statement with a laughter and some advice on how to be more honest about her feelings.

As the series goes on, Centorea has come to trust Rachnera to some extent, even if still somewhat resentful. In turn, Rachnera mostly gets along with Centorea, but that doesn't stop her from occasionally teasing her, much to the Centaurine's annoyance. Rachnera also tends to be annoyed by Centorea's tendency to act rashly, as seen in Chapter 53 and Chapter 77.

As Rachnera states in Chapter 77, she feels Centorea is a real pain in some things like changing clothes.

Suu
Notwithstanding Rachnera's frightening appearance and the initial reserve of their other housemates, Suu and Papi have taken a liking in the Arachne ever since she first moved into the household.

The two hold Rachnera in high regard, valuing her knowledge and the time she spends helping them with their studies to the point she has quickly become their favourite “teacher”.

Rachnera also babysits Suu and Papi on occasion, seemingly getting along with their mischief.

Meroune Lorelei
Meroune has always treated Rachnera with ostensible kindness, at times addressing her in a very polite fashion.

When Meroune had apparently been kidnapped by Octo, Rachnera tried to make good use of her abilities in order to come to her rescue.

Lala
Lala has a somewhat fear of the arachne due to the fact that she "played" with the dullahan's headless body while the rest were out searching for her head, and subsequently when Rachnera threatened her with extreme bondage for claiming to have come to reap Kimihito's soul. However, she like Centorea agreed that if Kimihito was going to die, Lala might as well get it over with. Later she said she wouldn't mind Lala staying as long as she can "bondage her".

Doppel
Due to her past with Kasegi, the member of the M.O.N team attempted to arrest Rachnera, although the situation was eventually resolved. Since then, Doppel and Rachnera have gotten along well, but also don't often interact together.

Tionishia
Due to her past with Kasegi, the member of the M.O.N team attemped to arrest Rachnera, although the situation was eventually resolved. Since then, Tionishia and Rachnera have gotten along well, but also don't often interact together.

Zombina
Due to her past with Kasegi, the member of the M.O.N team attempted to arrest Rachnera, although the situation was eventually resolved. Since then, Zombina and Rachnera have gotten along well, but also don't often interact together.

Manako
Due to her past with Kasegi, the member of the M.O.N team attempted to arrest Rachnera, although the situation was eventually resolved. Since then, Manako and Rachnera have gotten along well, but also don't often interact together.

Lilith
Rachnera had quickly taken a dislike to Lillith's mischevious nature, this behavior infuriated Rachnera prompting her to use her knowledge in rope-play in hopes that it could possibly change Lillith's nature for the better, in which they did. It was effective thanks to Rachnee's stance on Lillith's adulthood, which allowed her to be much more ruthless in her methods.

Miia's Mother
Rachnera's relationship to Miia's Mother is far from good due to the devious personality of the Lamia. This is evident from their first encounter in Chapter 27 when Miia's mother drugged all the other girls in Kimihito's household, including Rachnera, with the Lamia tea. Rachnera was particularly affected by the caffeine in the tea and had a strong hangover with severe headaches in the evening.

Rachnera's dislike for Miia's mother was further compounded in Chapter 61, when the Lamia ordered her pet snake Doku-chan, to paralyse the Arachne with her venom so Rachnera couldn't help Kimihito when he was forced to undergo "the special training of the Lamias".

As seen in the end of Chapter 63, Rachnera wasn't really sure what to make of Miia's mother when she learned that the Lamia had lied about, Studmuffin not being able to take Kimihito's place in the tournament, making it clear that the whole event was just a huge scheme by Miia's mother.

Papi's Mother
Rachnera first met Papi's mother in Chapter 28, but the two never really interacted together. Just like Kimihito and Miia, Rachnera seemed slightly shocked that Papi's mother looked just as young as her daughter.

Centorea's Mother
Centorea's mother and Rachnera haven't really interacted with each other, but they seem to have at least a neutral relationship with each other. However, Rachnera also said she couldn't stand people with loud voices like Centorea's mother.

Yukio
Rachnera hasn't interacted with Yukio as often as the other girls in Kimihito's household, but they get along well and respect each other.

Flounnder & Sebasstian
Rachnera's relationship with Sebasstian and Flounnder isn't really the best. Like Kimihito, Rachnera resents the selfishness of the two fishfolk butlers, such as when the two were more concerned about their own personal disadvantage than the potential danger Mero was in during their "kidnapping". This dislike was reinforced when Sebasstian and Flounnder didn't tell the group about the giant anemones in Octo's cave, with Rachnera angrily saying that she would later drown the two butlers.