I don't remember the exact descriptions or pictures of the characters. But her are some pictures that are close to what I imagion Katherins couples visions might look like
Roxy and Ruslan
[Img=http://files.myopera.com/myreflections/albums/5771502/thumbs/wallpaper-wallpaper-art-Love-fantasy-amor-Couples-pic-k-album-Non-mai-lAmore-di-conclusione-myalbum-tarun87-my-album-Couple-vampire-fantisy-stuff-melody-sat-romantic_lar.jpg_thumb.jpg]
Roxy and Pride
[Img=http://iamnumberfourfans.com/wp-content/uploads/2010/06/Underworld1.jpg]
Roxy and Sam
[Img=http://2.bp.blogspot.com/_ALANC02ujc4/TAaIS1sDRvI/AAAAAAAAC6U/uYU9_RwaSuo/s1600/Cloud---Tifa-final-fantasy-680702_1280_769.jpg]
Roxy and Cody
[Img=http://www.jpnanime.com/wp-content/uploads/2013/07/squanoa.jpg]
Liz and Sam
[Img=http://fc08.deviantart.net/fs19/f/2007/238/5/b/Fantasy_couple_by_nellylynn.jpg]
Liz and Cody 
[Img=http://www.realstylenetwork.com/news/celebrities/files/2013/01/tom-cruise-nicole-kidman.jpg]
Liz and Pride
[img=http://fc00.deviantart.net/fs11/i/2006/207/8/b/couple_by_valerag.jpg]
Liz and Ruslan
[Img=http://fc04.deviantart.net/fs51/f/2009/324/e/0/Couple_by_Basistka.jpg]
Cassie and Pride
[Img=http://fc04.deviantart.net/fs31/i/2008/234/a/e/couple_by_secowankenobi.jpg]
Cassie and Sam
 [Img=http://www.desipainters.com/wp-content/uploads/2011/03/6275.jpg]
Cassie and Cody
[Img=http://fc05.deviantart.net/fs16/f/2007/193/e/d/couple_tiny_by_nami86.jpg]
Sintara and Sam
[Img=http://1.bp.blogspot.com/_pomgzRJRxII/TGz6sGGO-dI/AAAAAAAAAHk/_NTVm2Vdq_M/s1600/couple.png]
Sintara and Pride
[Img=http://fc03.deviantart.net/fs11/i/2006/212/c/2/Couple_by_Aina_chan.jpg]
Sintara and Cody
[Img=http://fc07.deviantart.net/fs4/i/2004/227/0/5/Couple.jpg]
Sintara and Ruslan
[Img=http://th04.deviantart.net/fs70/PRE/i/2013/344/2/8/couple_by_cantrona-d4dzvga.png]