I reached the capital what do I do now?
That's as far as the main story goes so far! You're stuck waiting for updates like the rest of us, though there's plenty of stuff to explore you might have missed.
Have you met Venifica and finished the side content involving her? Same with Vili. Have you beaten all three current levels of optional fights against Sofia? Have you figured out the secret of the Hidden Glade?
Vili is an Arch Imp, which you will run into after you get the sigil of allure, Go back, go to the imp den, rush into the den and successfully beat them all. There will be an open passageway, follow it and you'll run into a woman with HUGE tits. After meeting her (and if you choose to fight her, you get a funny scene), you have the chance to play with Vili, if you accept her offer. Gotta be somewhat powerful if you accept the challenge! If you've beaten Sofia's three challenges you should be plenty powerful enough to face Vili's challenge!