Sayaka Jumonji

The editor-in-chief of Comic Heat and Tohru's superior. She is Hinata's rival who disapproves of her methods of molding manga artists, believing that they should be successful in their own right and that there were a number of artists under her wing that failed to be successful, which is negatively affecting the manga industry. It is revealed that she once worked with Hinata in the past for a manga magazine, though the main reason for her breaking up with Hinata remains unknown.Despite her rivalry, she still has some degree of respect for Hinata, as she refers to her by the senpai honorific. She can also be quite intimidating, especially towards Tohru.(Wikipedia)