Vash and Wolfwood have been good 'friends' for quite some time now and Wolfwood is still set about protecting Vash so he never left his side.

a while back he found a random piece of red string stuck to his pinky finger and he was never able to get it off and eventually he got frustrated and stopped trying..

*but one day as he was traveling with Vash when he noticed something strange on his pinky finger, the same red string he had.

"uhmm, hey Vash? what's that on your pinky??