Maron

Maron is Haruna Sairenji's dog. Maron often describes himself as a "Proud Boston Terrier". Maron has the utmost respect for Haruna, because she takes such good care of him. Maron sees himself as a freeloader, and feels that he must protect and comfort Haruna. Maron hates baths, however, he would never let Haruna know that.

Maron believes that licking is a pet's greatest form of affection to its master, and takes great pride in his "skills" in licking, apparently not knowing its perverted appearance on a female human. In chapter 44, after Rito became a dog because of Lala's body-switching invention, Haruna ignorantly brought him home to take care of him, and Maron aggressively teaches him to lick Haruna, which Rito reluctantly forced himself to do before running away in shame.

As Nana Aster Deviluke is able to speak with animals, she and Maron occasionally speak to each other. She asked Maron to help console her friend, Mea, and Maron proceeded to aggressively lick all over her, possibly causing her to develop a fetish for being licked.