Hoshino, Yumemi

ほしのゆめみ

Yumemi is a kind-hearted yet excessively talkative gynoid attendant at an abandoned planetarium, designed to resemble a young girl. She is slightly damaged and entirely oblivious to the changes that have taken place over the last 30 years, since none of the facilities and databases she connects to still exist.
Consequently, she treats the protagonist as a regular visitor by addressing him as "Mr. Customer" and describes the world as it was prior to the war. She fails to comprehend any information he shares with her, except for details pertaining to her duties at the planetarium.