Who is Imam Mahdi?

I wish the whole world knew that such a bliss will be brought to them by your Reappearance that no eye has ever seen and no ear has ever heard.
#ThePromisedSaviour
#twelfth_Imam
#مهدی_عج
#منجی
#منجی_موعود
#ظهور
#Thepromisedsaviour
#Saviour
#savior
#appearance
#Mahdi
#twelfth_imam