アンナ・フィランテ・エステロイド
from KonoSuba: God’s Blessing on this Wonderful World!
Origin
Kingdom of Belzerg
Anna Filante Esteroid is a ghost that originally lived in Kazuma's mansion. Anna appears to simply be lonely and enjoys the company of Kazuma's party. She plays pranks on Aqua quite often and enjoys listening to the stories they tell her of their outings, implying she has an adventurous, slightly mischevious personality. She is the dead illegitimate daughter of a noble who was the former owner of the Kazuma's mansion. Her father died from illness while the mother went missing. The girl contracted the same disease as her father and died without seeing the faces of her parents. She liked dolls, fine wine and stories of adventurers. When Aqua performed her exorcisms in the mansion, she left Anna alone, because Anna is a good spirit and was technically the owner of the mansion. Wiz is also acquainted with Anna.

KonoSuba: God’s Blessing on this Wonderful World!
After dying a laughable and pathetic death on his way back from buying a game, high school student and recluse Kazuma Satou finds himself sitting before a beautiful but obnoxious goddess named Aqua. She provides the NEET with two options: continue on to heaven or reincarnate in every gamer's dream—a real fantasy world! Choosing to start a new life, Kazuma is quickly tasked with defeating a Demon King who is terrorizing villages. But before he goes, he can choose one item of any kind to aid him in his quest, and the future hero selects Aqua. But Kazuma has made a grave mistake—Aqua is completely useless! Unfortunately, their troubles don't end here; it turns out that living in such a world is far different from how it plays out in a game. Instead of going on a thrilling adventure, the duo must first work to pay for their living expenses. Indeed, their misfortunes have only just begun!