Victoria 4 is a pay for figure by Daz3d.

You can get just the base figure:
http://www.daz3d.com/i.x/shop/itemdetails/-/?item=4783
and the morphs seperately
http://www.daz3d.com/i.x/shop/itemdetails/-/?item=4787

or a bundle including the morphs:
http://www.daz3d.com/i.x/shop/itemdetails/-/?item=4781

There are also some free Daz figures available from Download.com
http://www.download.com/Poser-DAZStudio-3D-Models-Pack/3000-6677_4-10581779.html?tag=lst-0-3
Victoria 3, Michael 3 and Aiko 3 are just the base figures, you would need to buy their additional morphs from the Daz3d Site to be able to use many of the character packs available for these figures.
Hiro 3, however, comes complete with his morphs.