King Consort / Queen Consort

Title given to the marital partner of a King or Queen. If there are multiple partners being given that title, it is preceeded by a number in order of seniority.
  It is not hereditary nor lifelong, in case a divorce were to happen.
  Their children are Crown Prince or Crown Princess and Prince or Princess 

Notable Holders

Queen Elluka Greyger - although a queen consort, she strongly dislikes being referred as such and the title only appears in official and historical documents and is only used in official events requiring extremely formal introduction.
Type
Royalty, Household
Status
In use
Form of Address
His Majesty / Her Majesty; then Sir / Ma'am
Alternative Naming
(rarely since confusing) King / Queen
Current Holders
Reports directly to