Robin whistled. Miasma's overall stats were impressive.
Able to move at the near double highway speeds, when in the right form, and had the endurance to put it to good use-
Miasma, in what seemed to be her default form, moved along the treadmill at a steady walking speed, "we're going to increase the speed," the doc said and Miasma shifted to her legged form, steadily increasing pace until she was at nearly twenty miles per hour, and going by her pace, this wasn't tiring her at all. Then, she tripped as the speed increased more. She shifted so fast it was hard to track, but the next thing he knew, she was a sphere rolling along the treadmill, a ring of what looked like clear rubber spinning rapidly around a central orb where her skull remained stationary, mostly. The speed increased further until it hit 102 miles per hour. She was at her limit of speed with her still being in control. All that while keeping it up for close to an hour.
She practically ignored most forms of physical damage-
Miasma dropped the clay pellets from the last test out of her form, they'd torn through the plastic/rubber layer she'd started to make on her outsides, but hadn't done any actual damage. With her permission, the ammunition increased in power until one actually managed to blow her head completely off, a small caliber pistol, but it didn't really stick since she just pulled the goo back into her and reformed the skull. Didn't stop Dr. Meyers from freaking out. Blunt force seemed to have even less of an effect on her. The only real danger seemed to be her growing more sluggish in pulling herself back together as the amount of material making up her form diminished.
And was resistant to many of the common forms of elemental damage-
Testing Miasma's resistance to heat, electricity, and other esoteric effects proved difficult as her chemical makeup shifted with each test to resist it more than her base form. She'd turned parts of herself to rubber in the electricity test, practically making her immune to commonly used voltages, though lightning would still be harmful, she'd formed a fire resistant powder on top of her skin, snuffing the flames almost instantly, though she did become more runny when in abnormally high temperatures, fire wouldn't be an issue, but heat would if sustained. Cold, however, proved more debilitating if not damaging, she grew stiffer and slower as the temperature dropped, but was otherwise unharmed by the experience. Acids, poisons, and other chemical attacks were useless since she just kinda, ate them, though larger doses seemed to make her sick for a bit. And wasn't that weird to see.
She could change her physical shape and proportions to an incredible degree-
"Alright, let's see how small you can go," Dr. Meyers said, "try and shrink down as much as possible," and Miasma certainly did. She got down to the size of a baseball from being nearly the same overall volume as Robin, and she could still sense while like that, though she couldn't speak very well, apparently. After returning to normal, she'd mentioned feeling different while that compressed, but couldn't describe how. More tests proved she could slip through cracks as thin as a dime if she had to and could spread into a thin sheen over a large area without much issue.
But all of that paled before what Dr. Meyers was calling her chemical forging abilities-
"We've seen that you can convert portions of yourself to rubber and plastic, but how far can you go with that?" the question had been pretty innocuous. But Miasma proved that wrong. She could recreate several chemicals that were a part of her, including making them stable in forms other than their base form. She'd recreated Venom, the Fear Toxin, and Joker Venom easily, as well as several varieties of commercial plastic, synthetic fibers such as nylon, street, prescription, and over the counter drugs in various concentrations, and that wasn't even getting into the plastics and oils.
Other tests had proved her to actually be quite intelligent for her apparent age of 13, though unlearned would probably be a good term. She was a problem solver, street smart more than book smart, though given she seemed to practically soak in the chemistry books that Dr. Meyers had given her after her display of chemical forging, that wouldn't be too far off.
Robin laughed nervously as he heard the last test, where she showed she could change her voice very easily, matching his, Dr. Meyers, his team's, and even Batman's. She even mimicked noises such as camera snaps, glass clinking together, and general mutterings of people. God she would have been a nightmare if she'd become a criminal or dealer,
or worse, Robin thought,
if she'd imprinted off of Croc instead. Having her as a predator would have been terrifying.
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"Gotta admit!" Captain Marvel started, "That was pretty cool," he pointed towards Miasma. He'd arrived just after the they finished the speed and endurance testing, "She actually got better after reading those books the Doc gave her. I saw her experimenting between tests."
Batman's look got him talking, "she looks down and to the right when she's making something, and some of her back bones twist back and forth when she's trying something new, and she gets these little swirls of color, it's actually fun to watch."
Batman nodded, "I noticed the same thing," he replied, "Beyond that, she lost very little mass even when removing fairly significant amounts of material for testing."
"Huh, that sounds like it's important."
"It is confirmed that she is an elemental, a pollution elemental. That means magic is involved," Batman explained, "her abilities are a result of her nature imprinted with a human soul."
Captain Marvel considered this, then nodded, "I know someone that can help, I'll talk to him. But first," he grinned, "Can I talk to her? She seems interesting."
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Miasma waited in a room with a scientist from Dr. Meyers' team, she had little wires leading to her ears while she wrote on a clipboard and a bag of some kind, made of faux leather, sat next to her seat. Every now and then, she'd look up, but otherwise kept to herself.
She wondered about the wires, no other humans had those, it was interesting, in a way. What were they for?
"Excuse me," she called out. No reply.
"Hello?" she started to move closer. Again no reply.
Closer still, "can you hear me?" she said louder. No reply once more.
Standing close, the woman looked up, and jumped before pulling the wires free, "What?" she asked, startled by Miasma being so close.
Miasma pointed to the bead at the end of the wire, "what are those for?"
The woman blinked, looked down at the earbuds, and looked back up. She sighed, "right, new to the planet. They're for listening to music."
"Music?" Miasma asked, and the woman froze, looking at her with wide eyes.
"You don't know what music is?"
"Um, I've... never heard any? I know it's sound, but, no?" she shrank in on herself, looking nervous.
The woman, surprisingly, got
giddy from that revelation, "Hold on," she reached into her purse and pulled out a... pouch of some kind? She unzipped it and pulled a wire, which she then put into a device she pulled the headphones from.
A few moments later, a
song started to play.
Miasma listened, fascinated. She found herself moving to the odd rhythm of the music. She would have smiled if she could. It had an oddly mellow intensity that drew her in, and the distortions in the music itself... it resonated with her.
The scientist was smiling widely when Miasma looked at her again as the song ended. She 'blushed' darkly, "you like it, huh?"
Miasma nodded, still embarrassed, "I can recommend some other songs if you'd like. Always fun to get someone into music. May need to invest in specialty headphones though, don't know how well standard ones would work for you."
"That would be wonderful, Doctor."
"Please, call me Alice," she insisted, "Want to hear some other songs? I've got a playlist you might like," she asked, only to smile more when Miasma perked up.
Fifteen minutes later, Dr. Meyers, Batman, Robin, and Captain Marvel walked in to see Miasma singing along to a soft, folky
song with a voice
very close to the actual singer. She waves, but doesn't stop singing until the song ends a few seconds later.
Dr. Meyers laughs, "well, I can see you made a friend, Alice."
Both Miasma and Alice blushed at that.
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AN: And here we have the testing. Miasma's actually pretty middle of the road for the YJ characters. She's versatile in a way similar to Aqualad, just aimed differently.
Also, the music! I always intended for Miasma to hear something from Blackmore's Night, but I didn't want it to be her first look into the world of music, I wanted her to hear something more... modern (for a 20 year old song

) compared to the Folk Rock favored by Blackmore's Night, and Tool fits the bill.