Kyouhei Mitsugi

He has a book about Winfield Kingdom, he was curios about the monster that he and Shou encountered during the 1st episode. Near the ending of the 2nd episode OVA, he was able to visit Winfield Kingdom after he and Yuuto didn't not join Shou and the others to find the Black-wings. He is introduced in the first episode bullying Anri. He also seems to be the narrator of the story.

(from Wikipedia)