"It's still just an idea..."
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Her current master. She feels that Tenjin is much better than her former master, and together they like to tease Yato and his way of living.
Her former master. She worked for Yato for three months before she called it quits, saying that she had enough of living like vagrants and having to endure not only Yato’s lazy attitude, but also his sweaty hands. They have been insulting each other every time they meet since then. However, she still worries about Yato whenever he is in trouble.
Mayu and Yukine have the shared experience of having Yato as their master, and because of this she feels like they could be good friends. As she experienced living with Yato first, she feels pity towards Yukine and always dreams of gossiping about Yato with him. She doesn't seem to look down on him for the events leading to his ablution, but still offers him stern advice about what it means to be a shinki and the importance of showing his loyalty to Yato.
She and Mayu got along pretty quickly and are generally very good friends.