Beware the Savage Hulkhound! If you ever - and I mean EVER make Loona angry, she will get all big and green, and will smash you to death. So be careful being around Loona, and remember to treat her well, because you better not make her angry... and you wouldn't like her when she's angry.
The Concept of the Hulkhound is a mixed of Loona and both the She-Hulk and the Hulk, and what I mean by that is that her Hulkhound form is a mixture of both the Hulk and the She-Hulk. So she's both the Hulk and the She-Hulk. In her Hulkhound form, Loona is capable of having complete control and is self-aware, but when she goes into a rage, she starts to act like the Hulk himself by going on a rampage and smash anything she finds like a mindless beast until somebody she knows and loves are able to make her come back to her senses.
So Loona in this AU is a mixture of both the Hulk and the She-Hulk.
=================================== This drawing belong to me. Loona and Helluva Boss belongs to VivziePop/Vivienne Medrano.
She-Hulk/Hulk both belong to Marvel Comics and Stan Lee.