Add a little bit of hair, some boots, jewelry, a funky sword belt and a loincloth plus change the dowel rod he was holding into a sword and and Bob's yer uncle! It's fantasy art.
In the 1880's British Prime Minister Robert, Lord Salisbury promoted his nephew Arthur Balfour to several public offices for which he had no qualifications he even went on to be Prime Minister himself in time. This is believed by many to be the origin of the expression "Bob's yer uncle" for something that works out perfectly with little or no effort on your part.
I wonder who this guy is fighting with.