Lisa

Lacy is a character of the day who appeared in Seeking Shelter from the Storm!. She was an old lady who lived in a large mansion on her own. She passed away prior to the events of the episode, and was only featured in a prominent portrait in her former home and in a flashback.

While living alone in a mansion, Lacy was regularly visited by a wild Espurr. She gave it food and played with it. At a certain moment, Espurr witnessed Lacy having health problems. Assuring Espurr that she was fine, Lacy gave Espurr her favorite pendant necklace as a keepsake, which was a precious gift she had received from her husband.

The next time Espurr returned to the mansion, Lacy was nowhere to be seen. Remembering the good times Espurr had with Lacy, it decided to stay in the mansion, all the while wondering where Lacy had gone. Years later, the mansion was visited by Ash and his friends, who were seeking shelter from a storm. Eventually, Espurr befriended the group and asked them to help it find Lacy. Right at that moment, Lacy's granddaughter Elise showed up.

Elise explained that Lacy had passed away, much to Espurr's sadness. Elise had initially planned to tear Lacy's mansion down, but after meeting Espurr, she decided to renovate it instead. She asked Espurr if it wanted to visit Lacy's grave with her, and Espurr happily agreed.

(Source: Bulbapedia)