“I want to adopt the bespectacled one,” Galib announced. “I like that look of curiosity in her eyes. It reminds me a bit of myself.” He approached the girl and stared into those through his mask’s lenses.
“Will it… hurt?” she asked the horseman of pestilence.
“Maybe a bit, but it’ll be worth it for the knowledge you’re about to acquire.”
Iris couldn't help but let out a small gasp of surprise, as it felt like the demon lord had directly spoken to her soul. With parents who were most of her life away at work, she had spent most of it with books instead, trying to learn as much as possible to sate her ever growing curiosity. When the demons attacked it just gave her more to research and she willingly let herself be captured to observe demon society from the first row. She watched her father being turned into a demon’s pet and her mother becoming another's permanent cocksleeve and didn't feel much aside from the small satisfaction of learning something new. She’d describe the unequal twins and the shy-animal-lover-turned-demon-princess now called Carmilla as the only people she was actually close to and that was now paying off. Of course she didn't expect that to happen when they convinced her to try out friendship, but they had promised she'd benefit from it.
The beak of Galib’s mask opened slightly and purple mist started coming out, which gathered exclusively around Iris. Some of the mist got into her lungs causing the girl to get into a coughing fit as all her clothes, with the exception of her glasses, dissolved. Despite her coughing Iris noticed the black splotches appearing all over her skin, multiplying and growing by the second. She carefully touched one of the spots on her arm and felt the texture of rubber instead of skin. Soon her whole skin below her head had turned into glossy black rubber.
Suddenly Iris clutched her head as intense pain spiked through it, both from the inside, as new memories made themselves known, and the outside, as the changes there began. Her glasses started pushing uncomfortably against her eyes more and more until it suddenly stopped, though instead she felt herself unable to blink. Her glasses had fused with her eyes, leaving on her face two big lenses with pixelated recreations of her pupils seen on them. As latex further spread over her face her mouth started pushing out. Iris’ nose flattened away while her lips bloated up, fused together and turned into a big round filter. Tubes came out of the filter and attached to her back and with that her face turned into a gasmask. Lastly the individual strands of her hair also became latex and turned a toxic (of course) green.
But her transformation wasn't finished yet. A thin tube-like tail pushed out of her tailbone and ended in a sharp tip she could use to inject others. Additional small growth appeared on her back which she could extend at will into tentacle-like hoses. Her small breasts became translucent and small tubes from her chest attached to their undersides. The nipples smoothened away, though she could make them reappear whenever she wanted. The same happened to vagina and butthole. She felt pressure in the soles of her feet and her line of sight rose several inches as plateau formed under her feet as a part of them.
The pain in her head finally subsided and the demon girl could see her new memories with clarity now. She was Erra. She was the daughter of Galib, the smartest mind in the demon realm and horseman of pestilence, as well as cousin and best friend of Carmilla, second princess of the demon realm. She was created with the purpose of becoming the perfect successor to him.
Her body could create any poison known to man and even completely new ones and disperse them in any form through her various tubes, orifices or her ‘mouth’. Unlike the other demons she didn't need wings to fly. Instead she can just manipulate the density of the gases inside her hollow body, which was far more efficient in her opinion. Her now translucent breasts allowed the storing of liquid poison through. The material was very durable and stretchable and filling them came with the added effect of increasing her chest. She immediately pumped them full with a purple liquid until they reached D-cup.
With the transformation finished Galib approached her and gently touched her chin while looking her over. “You turned out great, my daughter.”
“Thank you, father,” the voice that came out the filter resembled Iris’, but with a robotic tone.
“You will make a great successor to the title of Horseman of Pestilence, I can already tell. I’m looking forward to rüteaching you everything I know.”
The pupils in Erra’s eyes turned into literal stars. “Really? I’m so excited!”
Galib chuckled. “Pace yourself, my little doll. We’ll have to do this later, there are still some important matters for me to address. In the meantime you should go and thank your friend. I raised a girl with manners after all.”
Erra nodded. Immediately she walked over to Carmilla to press their bodies together and repeating “Thank you!” while jumping, her lenses displaying hearts. She broke the hug and they looked over to the twins Mica and Nica. Nicole backed off a few steps, while Mia completely hid herself away from their eyes behind her sister. So they still weren't convinced of this, some people had to be forced to their happiness. And Erra was looking forward to seeing it.