Lankini

Then he made himself small, about the size of a cat, and went towards the city gate.

And there he was met by the guardian goddess of the city herself, Lankini, in the form of a fearsome demoness, who challenged him.

They fought, and Hanuman struck her with his left fist, holding back his strength because she was a woman.

She fell, and then she spoke.

You see in Ramayana, when the citadel of Ravan has to be destroyed.

So, what is the indication? Ravan has been told, the day Lankini dies, she is the guardian of that place Lanka.

When she dies, know that your reign is going to come to an end.

So, Hanumanji, what does he do? First thing he does is, he neutralizes.