She seems easygoing and friendly. She is especially nice towards Ryuji, and calls him "Ryu-chan". The two are childhood friends, and she even embarrasses him by mentioning that he was in love with her and asked her to marry him.
Mephisto Trial arc
When the Kurikara is broken after Rin's fight with Amaimon in the forest, the group travels to Kyoto where Yoshikuni is. She fixes Rin's sword, and then the class returns it in the nick of time for Rin to defeat Amaimon who was recently rampaging in the Vatican.
Powers & Abilities
She is a very skilled blacksmith, and was able to fix the Demon sword.
- "Even if I went there, I wouldn't be able to help them at all. I have to do what I can do. Gods of Forge, please protect Ryu and his friends."