Is the Guilty Crown(Cat's Cradle) that Yuzuriha Inori offers Ouma Shu Jacob's Ladder? Inori offers Shu the Guilty Crown(a form of the Cat's Cradle) in the first episode. Is the Cat's Cradle variant Jacob's Ladder?
Yes, the string figure Inori offers is 4-step Jacob's Ladder.
In Japan, the hobby is known as ayatori. Also, in ayatori term, the string figure Inori offers is called hashigo (ladder), specifically 4-dan hashigo (4-step ladders).