((I know, I still have to finish the Lexa character! I promise I'll finish that one! xD))

Name: Lily and Lucy
Age: 50 Earth-years
Race: Alraune (plant-life)
Tentacles?: Yes, they use their roots as tentacles.
Cock size: 7 inches in length, 2 inches in diameter (The twins can 'attach' roots onto themselves, serving as cocks)
# of cocks: One per twin.
Sexual Oddities: Since the girls enjoy exploring the human body in general, they enjoy many parts of the human body. They love a woman with plump thighs. Tongue-play is also something they enjoy, licking their victim all over. When they are able to bring a victim into their main 'plant' (pictured below), they love to sandwich their victim and encase them in rich honey. They are very open to human desire, and in an attempt to please the humans they toy with, will obey any sexual commands their victims give them without a second thought.
History:
Billions of years ago, near the beginning of the universe itself existed a race of humanoid beings known as the Tai-thall. Arguably one of the first intelligent civilizations to emerge in the universe, the Tai-thall developed as a species rapidly. It wasn't long before they were able to explore the cosmos. Hoping to promote the aspect of life, they had sown seeds across many planets and allowed for intelligent life to grow. However on one particular blue planet, known to the Tai-thall as simply as GER-24B, contained a promising plant-organism race and a developing insect race. The Tai-thall accelerated the evolution of the insect race in hopes of putting them on par with the plant-organisms. However, the insects dominated the planet and nearly wiped out all of the plant-organism species. The Tai-thall had seen this and gathered together the remnants of the surviving plant-species and hoped to revive the species. They had done the plant-organism species much harm, and hoped to restore it to its former glory.

In truth, Lily and Lucy never knew how they had come into existence. They just... woke up one day. As their eyes slowly opened, they remember being encased in some strange blue fluid. There were dark silhouettes all watching her. Some had clipboards in their hands. Others were viciously pressing their fingers into strange mechanical devices that seemed to light up. They reached out to try to communicate with those beings, but they were stopped by some invisible force. 'Glass' was simply what the dark silhouettes called it. While curious, they were confined in tubes. They weren't quite sure how long they were in the tubes. Years passed and even the faces of the men they saw were eventually replaced. Every here and then, the girls would listen into the men's conversation through the glass. Words like "war machine" and "artificial monster" were the words most often repeated. What did they mean, the twins often wondered.

One day, the scientists returned, but with a stern look on their face. The twins looked at the men, clearly concerned for them. What caused such a pained look on their face? Then, they had found out. Needles sprang down and were injected into the girls. A burning sensation erupted through their skins. They tried to shake the needles off, uncomfortable with this new sensation. They banged against the glass until... everything went black.

When they opened their eyes, they were no longer staring at the scientists, but rather another large tube containing another specimen. It was a beautiful girl covered in ivy thorns.

"The cloning process has been completed." A voice said.
"With this, we will be able to mass produce these Plant-based Monsters."
A second voice spoke up.
"So, what shall we name them?"
"Hmm... They shall be known as Lily... and Lucy."

And so life returned back to normal. The girls watched the men work on their machines. But this time, they had a playmate. The girls would often tap the glass and childishly giggle at each other. This life wasn't so bad. That was, until the girls realized how to use their abilities. Each time they had tapped the glass or moved their bodies, they realized the ivy surrounding their bodies moved around accordingly. It was as if the roots were an extension of their body. The girls practiced moving them, and the men were impressed. Yet, they were so impressed that they failed to realize the girls were growing exponentially stronger by the day. When the twins had fully learned to use their roots, they slammed against the glass and it crackled, breaking open and spilling the blue liquid. The men were in panic and attempted to obtain their guns to attack the twins. But the twins were too fast. The roots wiped across the room and destroyed everything in sight. All the men could hear was the electricity created from destroyed computers, and the twins giggling. "Let's play!"

The men were never heard from again.

Motivation: Since the girls had been born into a fairly isolated area, they are naturally very curious beings who hope to experience new things. They attacked man and women alike, exploring the human anatomy in an attempt to understand what made the humans worked. They realized that some humans had reacted... almost joyfully to being touched in certain areas. The twins loved playing with humans. So, they attacked and raped any human that crossed their path. They would often be called 'monsters', but shrugged off such a cry. The twins were surrounded by humans all their lives. So they must have been humans too, not some vicious monsters! The twins truly believed that they were humans. At first, they believed that the humans hated being attacked by them. But a romantic session with the twins, the humans were often numb from the pleasure, with a smile across their lips. The twins decided that that was what they would do for the rest of their lives. They would serve the humans.

Then, they ran into beings that weren't... as human. These things called monsters attacked humans. The twins were appalled by this and had decided to protect humans from these monsters.

Lily is the possessive twin. She loves to see humans in pleasure and hope that one they, she would be able to mentally break a human. After all, she was just curious. But in order to break a human's mind, Lily needed time. She wanted to keep every single catch for her own. Lucy was curious too, but in another way. She grew bored of the same human after a while and wanted to find new humans to play with. For that reason, Lucy always had to convince Lily to let go of their catch.

Powers: The twins are able to control vines and roots. Roots may come directly from their fingertips or emerge from the ground below. They also find that bees are attracted to their flowers. They use this honey and mix it with their own juices to create a perfect substance used to numb opponents, as well as provide immense sexual pleasure if placed on or in the human body. The honey can sometimes have life-like tendencies and move on the twins' whims, though they use this ability more so as a pleasure technique than an attack method. They are also able to 'melt' into trees and plant-life to blend in. They can travel through the roots of the plants they 'melt' into and re-emerge, essentially allowing them to a limited 'teleportation' (For instance, if the girls 'melt' into a tree, they can only 'teleport' to the furthest point of the roots). Their power grows through either sunlight or water.

Weaknesses: Any extreme temperatures, meaning a fire-based attack or an ice-based attack make the girls shiver in fear, as they can easily be harmed by either of those elements. If damage is done, the twins must retreat in an attempt to recover. Simple gusts of wind also scare the girls for some reason. They are also protective of the surrounding nature and would never want to put them in harm's way.

Appearance:

I just wanted to welcome you and wish you a happy hunting! I think you have a fairly unique set of monsters.

I see someone else knows of the MGE then.

And where is the character from?

Thanks Ishtar!

And Madison, would it be appropriate to say that the twins were born in an underground lab under shokushu?

That, I don't think would work too well. I would imagine that the island's geology would prevent anything complex like a laboratory, plus NICE labs doesn't like competition.