Because he's short.
After a battle...
Vladimir: *Pat Tora's head* Good job. You did well.
Tora: *Taken aback* !!!?? *Step back & hiss* Wh-wha--!? What the hell--?! Gross!! *Walk away*
Vladimir: Ah sorry. *Look at his hand* (...Whoops. That was an habit with Kimiko-chan and Xenon...)
Leo: *Laugh* Don't you look happy Tora?
Tora: *Angry but he couldn't stop smiling* Don't you dare tell him that, you stupid lion!!
Vladimir; ???
