Mayu (真喩) is one of Tenjin's shinki. Previously she worked for Yato under the name Tomone (伴音). Mayu has a very honest personality and a strong sense of justice. During the time she worked for Yato, she couldn’t stand his attitude. Not only did he constantly laze around, but he also often talked about killing and didn’t seem to care about humans that needed his help. Because of this she complained a lot and always insulted and badmouthed Yato after she quit. Despite her attitude towards Yato, she also respects Yato and cares for him. She often gets worried whenever Yato got into trouble even when she is serving Tenjin. At one point she volunteered herself to help Yato, who was impure due to Yukine’s actions. Mayu is also known as a courageous person, since she takes the risk of getting attacked by Yukine's phantom form during the purification ritual in order to save Yato.
Noragami: Stray God
In times of need, if you look in the right place, you just may see a strange telephone number scrawled in red. If you call this number, you will hear a young man introduce himself as the Yato God. Yato is a minor deity and a self-proclaimed "Delivery God," who dreams of having millions of worshippers. Without a single shrine dedicated to his name, however, his goals are far from being realized. He spends his days doing odd jobs for five yen apiece, until his weapon partner becomes fed up with her useless master and deserts him. Just as things seem to be looking grim for the god, his fortune changes when a middle school girl, Hiyori Iki, supposedly saves Yato from a car accident, taking the hit for him. Remarkably, she survives, but the event has caused her soul to become loose and hence able to leave her body. Hiyori demands that Yato return her to normal, but upon learning that he needs a new partner to do so, reluctantly agrees to help him find one. And with Hiyori's help, Yato's luck may finally be turning around.