Yes, It is true that those arrows which killed Vali also couldn't do any harm to Kumbhakarna. Here is how Valmiki Ramayana describes Kumbhakarnas Death::
दर्शयेक्ष्वाकुशार्दूल वीर्यम् गात्रेषु मे लघु |
ततस्त्वां भक्षयिष्यामि दृष्टपौरुषविक्रमम् || ६-६७-१५२
"O faultless excellent Rama born in Ikshavaku dynasty! Show your prowess on my limbs. After ...
The story is told in this excerpt from the Uttara Kanda of the Ramayana. Ravana was told by his father Vishravas that he should attain the status of his half-brother Kubera the god of wealth. (Kubera and Ravana were both sons of Vishravas, but they had different mothers.). So Ravana, along with his brothers Kumbhakarna and Vibhishana, went to the hermitage ...
Let’s take a look at how Kumbhkaran is described in general
Pg 269 from the book you shared
He sleeps (not because he is machine and needs maintenance but because of curse given by Lord Brahma. If you think he sleeps because of machine then how would you justify curse. You can’t.
That raksasa sleeps for six, seven, eight, even nine months at a time....
Ramayana is full of symbolism and through the narrative of Lord Rama & his life, weaves higher concepts of idealism and consciousness.
Even Rama’s enemies are no ordinary people and they represent some of the deepest aspects of human nature.
The demon brothers of Lanka, represent the negative aspects of the three gunas that keep the soul in bondage.
Kumbhakarna was able to eat a lot of food in his single meal since his childhood. The quantity of his single meal is equal to the food you can say like your whole life's food quantity.
Because of this the Devas from swarg ( heaven ) were in very much tension that if he lives for more like this then the whole earth's food will be finished.
Kumbhakarna was cursed by Lord Brahma. This story is told by Vibhisana to Lord Rama in this chapter of Yuddha Kanda of Valmiki Ramayana. In summary what happens is:
Kumbhakarna soon after his birth begins to eat thousands of living creatures.
Lord Indra was reported about this matter and he goes to punish Kumbhakarna.
Kumbhakarna plucks tusk of Airavata and ...
In Valmiki's Ramayana, I didn't get any reference That Rama praised Kumbhakarna after his death but when Ravana was slayed, his brother Vibhishana laments a lot, then Rama comforts him as:
वदन्तं हेतुमद्वाक्यं परिदृष्टर्थनिश्चयम् |
रामः शोकसमाविष्टमित्युवाच विभीषणम् || ६-१०९-१४
Ravana did not die in battle, without making an effort. He has fallen ...
We don't hear much of Kumbhakarna in the Valmiki Ramayana until the Yuddha Kanda in which he plays an important role for Ravana.
But before agrees to fight for Ravana, he severely rebukes Ravana for bringing on the war with Rama. He says to Ravana:
The same bad consequence, which was imagined by us earlier while taking the final decision after our ...
The only refrence of Kumbhakarna's wife I found is in Uttarkanda;
“There, with their consent, he chose two wives for his two brothers; the daughter of Virocana, named Vajravala, was given by him to Kumbhakama, and Bibishana received as wife the virtuous Sarama, the daughter of the King of the Gandharvas, the magnanimous Shailusha, and she had been born on ...