>>1688815That would be Sayo, she is a slime girl, but making slime girls with this is somewhat-of-a-bitch. She is actually a Water Mana, or Undine, within this universe (Somewhat inspired by Monster Musume and Kamidori Alchemy Meister). She watches over Lake Baikal, Russia, on our side of the multiverse, and protects the wildlife of that lake from pollution. She can take on any shape, any form, any size, and has full control over water.
She joins the group when their search lands them in Russia, and they are informed of a great lake monster causing havoc on anyone who comes near its waters. They decide to stray away from their objective, and check it out, and what they find is a giant, black, glowing monstrosity (Kind of impossible for me to recreate with Kisekae), pinning a man to the ground, and the lake behind it is filled with oil, and trash. The waters she'd protected for so many centuries was destroyed, beyond repair, and the pollution caused her to go on a violent killing-spree.
Unable to stop her, the gang is forced to retreat to the nearby town, where an old man informs them of the true character of the girl he named "Sayo," and the trouble that the a nearby power plant caused to the peaceful waters, as well as the pain it caused their guardian.
The group returns, and what they find is the head of that company, and his men, using electrifying weapons to try and destroy her. Of course, the group stops them, and the scared Undine takes her true form to thank them. The old man, along with the rest of the townsfolk show up and vow to fix the mess that Taroki Namatame caused.
When they return to Lake Baikal, later on, it has been restored to its original glory, and Sayo gratuitously joins their cause, telling them that she no longer needs to protect those waters.
She can change shape, form, and even color; although, she can't change color for long.
