Scylla

The protector and glorified secretary of the god of bioluminescence, Lumios.

Scylla is a serious, cold, and mysterious person, serving Lumios and Lumios only. In fact, she believes that Lumios is simply much more important than the five main gods, even if they are a minor god. She obviously cares for them plenty, hence why she's made it her life's goal to protect them even if they are perfectly capable of protecting themself.  It's clear Scylla has affection towards Lumios, and no doubt they return such affection.

She's a very strange creature in the way that it's not very clear what type of sea creature she's based on, but nonetheless, she does original from the sea in some regard. Her tendrils are something particularly curious about her because they all are prehensile and stretchy. Meaning that Scylla can not only use them to carry things but also use them in battle. Grabbing her opponents and throwing them, how fun.

The only downside to her tendrils is the fact that when cut, they take a long time to regenerate. So they are not the sole things she uses to fight, she most definitely has weapons of her own but also uses the claws (+the claw caps) to fight as well. She would do anything to ensure the safety of the very goofy somewhat reckless Lumios.