Little is known about her, but she had apparently lived a cheerful life with her husband, as the co-owner of an inn located in the quarter of Morioh, in S City. After Rohan's grandfather died, she closed the inn and rented the rooms out by the year.
In Rohan at the Louvre, in the initial scenes she receives Nanase Kishibe as one of the inn's guest, but asks Rohan to keep an eye for her because she's afraid Nanase won't follow the inn's rules. Later, when Rohan goes to the Louvre museum, she appears as one of the ghosts that haunts his grandson and almost kills him. It is later revealed that it wasn't actually her ghost, but a creature created at her image with Rohan's memory by Nizaemon Yamamura's painting.
She is mentioned as being the prior owner of a Gucci bag with a Stand (which she gave to her grandson, Rohan). Rohan mentions that she is now deceased. She seems to have had some knowledge regarding Stands, or at the very least how her Gucci bag's Stand worked.
Her inn itself was very ancient and located pretty far from the train station. Rohan had been especially fond of it due to the soothing peacefulness and the hot water that came from a nearby hot spring.
Rohan's grandmother has a set of rules that she required with respect to future tenants. Her conditions for admission were the following:
- No Smoking
- No Animals
- No Cooking
- No playing any instruments (including Mah-Jong)
- No bringing your own furniture
- No using a hairdryer
- No motorcycles
Couples were not allowed, not to mention children. The inn has a curfew as well; the doors close at 10 p.m.
According to Rohan, you could imagine that the house was nearly empty.