Who is this?

Answer

is

Vishwakarma

He is the celestial architect, craftsman, smithian.. and a lot of other things. His equivalent with Greeks would be Hephaestus. He built cities for Devas and Asuras, Pandavas and Yadavas too. He could trim the sun himself (his son in law), when his daughter couldn't tolerate him, and created the exquisite Tilottama to save the Devas. He also forged the Vajra,Trishul and the sudarshan chakra, amongst other divine things. Vishwakarma Puja, is celebrated in his honour. 

https://devdutt.com/articles/god-of-craftsmen/