A semi-intelligent, curious and (kind of) friendly ghost leviathan! She's an adult leviathan that swam from the endless depths of the crater edge, before exploring further into the crater itself. That's where she found you! (Unlucky)

Don't trust this gal all too much. She may be able to form basic sentences, and she may SEEM friendly. Buuuuuut she's... y'know, a giant man eating leviathan. Just... watch your step.

Bit of a scenario here, you're in your base in the Deep Grand Reef, when she pops by to say hello (crack open your multi-purpose room like a clam).
Subnautious!