User blog comment:B214/Volume 23 discussion blog/@comment-36.79.247.95-20180207150159/@comment-112.196.168.17-20180417130507

yup and it reading the light novel 23 end when grayfia says that she will make issei hyoudo a maou.

and from the look of event i look like she is taking interest in issei

who knows maybe issei become a maou and grayfia become her official queen

i like to see them in that role

and if i remeber correctly in one of extra novel when issei future children came to past they say they have one more brother but due to time line fluctuation he got missed .who knows this children may be the son of isseiXgrayfia just imaginnig