How do I Unfriend or Block a Companion?

You can do this by clicking on the menu icon on the header of the home page > companions > all companion > select companion > select the option from the dotted menu.
Or
click on the menu icon on the header of the home page > profile > companion tab > all companion > select companion > select the option from the dotted menu.
Or
click on share page > companion tab > all companion > select companion > select the option from the dotted menu.