Dr. Yoshiki Tanaka is a popular Japanese novelist who is best known for The Heroic Legend of Arslan and Legend of the Galactic Heroes. His works have been known to span across multiple media, including manga, anime, and even musicals.
Hiromu Arakawa is the award-winning artist behind the immesnsely popular Fullmetal Alchemist. In addition to Fullmetal Alchemist, she is also the illustrator/author of Silver Spoons which is currently available as an animated television series in Japan and the United States. Her newest work is as the illustrator of The Heroic Legend of Arslan, a featured title in the same magazine as Attack on Titan.