User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-23847729-20140704234848/@comment-82.114.83.84-20140705075053

Issei is an idiot that's why Sairaorg is more compatible.I don't know if it makes sense but to put it in a simple way'Issei idiot ,not good for maou,Sairaorg not an idiot ,good for maou'.I hope it makes sense to you