You've seen her before, but I think it's best to give you her ref sheet too.
Ulis Dyson, half avali, half slime. She's one of the most dedicated zoologists Rattackia has ever seen. She'd even climb into a monster's mouth to take a look at its teeth!
Along with Hades, the sentient gem in her chest that creates the slime and gives her the power to control it. He's also her assistant, performing scans, recording logs for her, and taking control of their body to stop her from climbing into the monster's mouth to take a look at its teeth.