Unit Number 25, commonly known as Noel, is the administrator of the Babylon relic "The Tower." Her basic personality is extremely sleepy, and she rarely descends to the surface.
When Touya Mochizuki visited Babylon, she requested food and a place to sleep, making that a condition for acknowledging him as her master.
527 years ago, a volcanic eruption caused the transfer ring from the ground to the "Tower" to disappear, making access from the surface impossible. As a result, starting 374 years ago, she docked with the "Wall," and has continuously traveled together with the "Wall" ever since.
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