Onam is an annual holiday and the Hindu festival is celebrated in Kerala, India. It is a harvest festival celebrated by Malayalam irrespective of religion. 
Wikipedia

So, here's a digital painting of Mahabali by me :)

Mahabali, also known as Bali, Indrasenan, or Māveli, is a daitya King found in Hindu texts.
Mahabali belonged to the Asura (demon) dynasty but was an ardent worshiper of Lord Vishnu. His bravery and strength of character earned him the title of "Mahabali Chakravarthy" or Mahabali - the King of Kings.
(Source: Google)

How's it?
Love, Fia❣