The irritated-looking boy opened the front of his clothes, revealing a tattoo reminiscent of a revolver’s chamber near his heart.
When he brushed a hand over the design, which appeared to be inked onto the flat surface of his skin, the tattoo spun, and a different design was loaded into the uppermost chamber.
Instantly, the boy Jester’s body swelled into a redhaired werewolf over two meters tall and leapt.
“See you, Assassin! I’ll have fun tormenting you with my love next time!”
The creature, whose speech had become coarser, climbed straight onto the roof of the house and flipped, speeding through the air away from Assassin.

Fate/Strange Fake: Volume 6, Chapter 20 ("Dream Becomes Reality")