Mindflayer

Encyclopedia Entry:
Grotesque enchantresses with tentacles growing from their head and lower body who form peculiar societies underground. Highly intelligent and dangerous with an extremely obscene mentality, they possess the power to manipulate the mind. They are of a different mind from even the radical faction of the Demon Lord's army, and although they have been influenced by the Demon Lord, they are not her underlings. According to one explanation; it is purported that they are a race who serve chaos monsters that slumber deep within the depths of the sea, and it is their duty to fill the land with their minions. They appear above ground seeking prey and they will not only target human men who serve as their partners, but also actively assault human women to entice them into becoming the same race.

They seize their prey as if embracing them from behind and slip their tentacles into the prey's head through the ears to directly pour in demonic energy and pleasurable signals. The rational mind and thoughts melt away, and the mind flayer slurps them up. The prey's mind is consumed by pleasure and the watery sounds of the mind flayer's tentacles noisily stirring about inside their head. The prey will be completely helpless and unable to do anything but gasp and moan. If the prey is male, then a lewdly obscene mind suitable for the partner of a mind flayer will be implanted inside his defenseless head. Once a man becomes a being that exists to have sex with a mind flayer, his body and mind will no longer put forth any resistance at all when the mind flayer habitually coils around her husband using her body and tentacles to induce pleasure. Such men will experience joy as their mind is melted and slurped out along with their spirit energy.

On the other hand, in the case that her prey is female, it is said that she won't immediately be converted into a monster, and will instead be released while still human. However, just getting a whiff or the odor of a human man or his spirit energy will be intoxicating, and she'll be unable to maintain her ordinary thought processes. In all likelihood the woman will have been partially modified so that only parts of her memories, values, senses, and perception will be that of a monster. She may have been granted only "a monster's olfactory sense", or she may have been implanted with a monster value such as "taking pleasure in being sexually desired by others", or a false memory such as "becoming a monster and having sex with a man."

While a woman will retain her human body, she will be inflamed with a monster's passion, and learn the pleasure of being a monster. No matter how much she masturbates and has sex, she will never be able to experience fulfillment in her human body, and her mind will be eaten away. She will start to frequently recall the pleasure and watery noise of having her mind slurped, and despite having been released will end up making her way back to the mind flayer on her own. When the mind flayer enjoys herself by sipping the taste of a woman's mind, she will notice that it is changing into something appropriately obscene and befitting of a minion. As if to reward her, she will change the woman slightly closer to being a monster. As these events repeat, eventually the woman will beg to be changed into a monster. Sometimes such women will sexually assault men while still human, in order to show off that they are of the appropriate mind to become a minion. After debauching her mind to such a degree, a woman will finally be accepted as a new "mind flayer".

Also, they themselves are always immersed in the obscene watery noises. Even if they don't have any prey, they will use their tentacles on their own bodies. In order to make sex with their partner more pleasurable and fulfilling, they continually melt their mind and reforge it into something even more obscenely debauched.

The squid-like thing covering their lower abdomen frequently squirms as if it were an entirely separate organism. It is said that they pat it lovingly with tentacles and then it releases white viscous fluid. "Men who become intimate with them are suddenly transformed into squids, becoming stuck coiled around their hips with a tentacle slipped inside their lower abdomen." This has been observed, but even when asked about the truth, the only response of the mind flayers is to smile alluringly.

Kenkou's Notes:
''今回の更新は、「マインドフレイア」さん. ''

This time's update is “mind flayer”-san.

''いろいろと正体不明な魔物で、他の魔物達と異なる恐るべき能力や精神性を有しています. ''

Much remains uncertain about these monsters, and they possess terrifying abilities and a terrifying mentality compared to other monsters.

魔王の影響で女性にはなっているのですが、どうやら魔王の部下というわけではないらしく・・・

They have become females due to the influence of the Demon Lord, but it seems they aren't actually underlings of the Demon Lord...

''というわけで、詳しくは　エロ魔物娘図鑑本文　をご覧くださいませ. ''

And so, for details please check the erotic monster girl profile.

Extra notes via KC's Twitter:
''マインドフレイアに関して補足しておきますと、夫のイカ化は可逆で、好きな時に人に戻ったりイカになったりできます. '' Here is some supplemental information concerning the mind flayer. The husband's squid transformation is reversible, and he can return to being human or change into a squid whenever he likes.

''もちろん人の姿での交わりもするんですが、人前でイカにぬぷぬぷされておきながら、人の姿の旦那と人前でいちゃつくのは恥ずかしｇ、何故か隠そうとするみたいです. ''

Of course they do it in human form as well, but while they are fine with being teased by a squid in front of other people, they're shy about doing it with their husband in human form in front of others, and for some reason, it seems they try to hide it.

''魔王の部下ではないですが、割とﾏｲﾝﾄﾞﾌﾚｲｱは他の魔物と仲良くしてるとか. ''

They aren't underlings of the demon lord, but mind flayers do get along relatively well with other monsters, or something like that.

例えば他の夫婦に頼まれて、夫に「自分はオーク（旧魔王時代」魔物娘に「自分は人間の姫騎士」という記憶を与えて、演技じゃない迫真のプレイの手助けをさせられたりしてるんだとか…

For example, if requested by another couple, she can give the husband the memory that “he himself is an orc (from the era of the former demon lords) “ and she can give the monster girl the memory that “she herself is a human knight”. This does aid in having realistic play that isn't acting, and stuff like that...

Trivia

 * This monster girl is based on the illithid from the Dungeons & Dragons universe. The illithid are more commonly known as Mind Flayers