Slime Girl

A slime monster who is the first enemy that Luka encounters in the game, the Slime Girl proves invulnerable to Luka’s initial attacks and unlocks his Flail Wildly skill. She is also somewhat of a nod to RPG games where slime-based monsters are fought early on.

She appears near Ilias Village, causing the villagers to panic while Luka goes to face her before his Baptism ceremony. He eventually sees her off after hurting her a little, causing her to run off and call Luka a "meanie".

Despite being the first enemy, she seems quite resilient as she is able to travel quite far afield for a Slime and is especially near Ilias Village, a place where monsters generally keep away from.

All in all, she seems quite playful and altogether harmless, ignoring Ilias’s commandments, although she seems to get a taste for certain men and abducts them after raping them.

Encyclopedia Entry
"Though the Slime Girl is usually considered a weak monster, the ability to freely control the shape of her body can make her a threatening enemy. A weak adventurer is sure to struggle against her.

''They are usually happy and not hostile towards humans. However since their staple food is male semen, they regularly seek out weak men to attack. They pleasure them by wrapping up the man's body in their slime to extract their semen. Keeping their catch stuck in their body, they are able to feed ten or more times on a single man. Most times after feeding, the slime girl will release her catch. However, there have been reports of the Slime Girl's taking their prey home if they really like the taste of his semen, keeping them there indefinitely.''

In addition, male semen is required for Slime Girls to divide into new Slime Girls."

Attacks
Slime Tentacle: Normal attack, will trigger hand bukkake on losing.

Recombine: Recovers HP, only used if the HP bar is not full.

Slime Wrap: Triggers bind status and causes damage. Will trigger crotch bukkake on losing.

Slime Handjob: Binded attack, will trigger crotch bukkake on losing.

Slime Absorb: Binded attack which leads to Slime Heaven on the same turn. Will trigger belly and crotch bukkake on losing.

Slime Heaven: Binded attack which leads to a one hit KO via instant follow-up. Will trigger belly and crotch bukkake on losing.

Battle Overview
In battle, the Slime Girl is pretty basic, expected as the first monster fought in the game. She quickly introduces the player to the bind status as the battle will start with Luka pinned by her, so the first port of call is naturally to use Struggle to break free.

After that it's all about using Attack, however the first time she will dodge it and the second time she will use Recombine to heal. Luka then has "Flail Wildly" as a useable technique through the Attack function, which greatly disrupts her healing technique. Seeing that normal attacks will only do less damage than she can recover with Recombine, using the technique is the best way forward. Once she has a quarter of her HP left, she'll flee.

If you wish to not take the battle so seriously, she does have some tools under her belt: Slime Wrap has two stages with the second stage allowing her to use Slime Handjob, another technique. She can also use Slime Absorb if you are binded and below half health, going straight to Slime Heaven and using it as an instant follow-up attack until Luka loses all his HP.

If Luka loses his first battle, the Slime Girl will take advantage of him after absorbing the lower half of his body, then taking him home to use him as a feeding slave and a mate.

Trivia

 * A Slime Girl being the first enemy may be a reference to various JRPGs, especially Dragon Quest, in which Slimes are often the first enemy players encounter. Ilias references this, naming the enemy the "Punching Bag of RPGs" in the Evaluation scenes.
 * She is the only slime-type monster that heals.
 * She is also the only monster that heals infinitely without drain.
 * Despite earning the ability to Flail Wildly, the attack is chosen through an additional Attack menu, not the Abilities menu as is the case in a normal fight.
 * Slime Girl has no breast related attacks or facial attacks, this makes bukkakes 1 and 2 unattainable in normal gameplay outside of the Encyclopedia. Also, bukkake 4 shows the semen inside her along with the remains outside.
 * A different Slime Girl appears in Grand Noah.