Natalnia is a supporting character in the anime A Playthrough of a Certain Dude's VRMMO Life. She is a young dragon and the daughter of the Red Dragon King, making her a member of the dragon royalty within the game world. Her name is exclusive to the anime adaptation. According to her backstory, while still inside her egg, Natalnia was stolen by an unknown member of the human race. However, due to an accident that killed all the thieves, her egg was left unattended. She hatched alone and was discovered by the protagonist, Earth, who heard her cries and took her in.

Natalnia's personality is not extensively detailed in the available material, but as a newly hatched dragon, she displays curiosity and dependence on Earth, who becomes her caretaker. Her motivations revolve around bonding with Earth and growing within the game's environment. She serves primarily as a companion to Earth, often accompanying him on his adventures and aiding him in combat with her dragon abilities. These abilities include flight, physical strength, and likely fire breath or other elemental attacks typical of dragons in the game.

Her key relationships include her father, the Red Dragon King, though their direct interaction is limited in the anime's story. Her most significant bond is with Earth, who raises her from an egg and treats her with kindness. Over the course of the series, Natalnia develops from a helpless hatchling into a capable creature, showing growth in both size and combat effectiveness. She contributes to Earth's party dynamics and occasional battles, but her primary role is as a affectionate, loyal companion to the main character.