Left to right...Leif is thirstiest for real people, Elisa is thirstiest for fictional characters, and Katya is thirstiest for no one.
Bonus art for Leif & Thorn
Volume 1 -- of which you can now pick up the ebook on Gumroad
! (This sketch isn't for a Kickstarter backer request -- you'll have to get the book to see most of those -- it's just some bonus