JohanLT
This a good story can be done great his martial spirit can be used differently in almost every situation if he can use his soul power to write on his paper make talismans and that will let him be a support type use his paper as origami making weapons or animals with his first ring's enhancements would be strong enough and and if he can write in the book make a contract where he can get what he wants by exchanging things might even kill a soul master and get a second martial spirit but origami art will do good here