This is Melania Alexanderson, the leader of an expedition to a lost temple... Except her name isn't actually Melania Alexanderson, it's actually Finka Dahlmans, one of the keepers of the temple over 500 years ago! Somehow she was cursed with a terrible immortality, and her real goal all along was to bring people to the temple to sacrifice in order to become mortal once more. Unfortunately for her, she was unsuccessful, and ended up getting cursed to become a normal feral cat. Maybe that's for the best, even if she's still immortal.