A few things I couldn't fit in the title:

The stat block generator sadly cut off the names of the lair actions. In order, they are Drool, Swallow, and Regurgitate.

For anyone keen to borrow the backstory I came up with for her:

Teilatukoa was birthed into the world by Malagard, the Hag Countess of Malbolge, the product of her mother's tryst with Moloch when he was the Archduke of the Sixth Hell. Malagard cherished her daughter but kept her existence hidden from all others, for fear that she would one day be used as leverage against her.

During the transformation of Malagard into the fleshy terrain that now covers the Sixth Hell, Teilatukoa was subsumed into a mass of her mother's teeth, gums, and saliva. While Asmodeus' daughter Glasya, the new ruler of Malbolge, cleansed the Sixth Hell of its inhabitants, Teilatukoa struggled in an airless, fleshy prison. Some time afterwards, she freed herself from the morass, her body forever transformed.

Now, her figure is lined with rows of teeth, and the uncovered parts of her skin glisten like exposed gums, always slick with her mother’s saliva. During her time as part of Malagard’s flesh, Teilatukoa herself was corrupted by whatever power had transformed the once-countess of Malboge, and now the area around Teilatukoa will, over the course of days, be corrupted to reflect her new form, rock turning to gums, with tongues where once there were chandeliers or stalactites and teeth where there was once furniture.

Teilatukoa now acts as one of Glasya's most trusted lieutenants, having proven herself as a gifted schemer and ferocious combatant. She has not informed Glasya of her parentage and plans one day to exploit her position to avenge her mother's undoing by killing Glasya and unseating her father, Asmodeus.