- An experiment made by 0207 who treats her like her daughter .
- She was cursed by a witch to be an anaconda.
- A hikkikomori.
- She has a long history of insomnia.
- She's a librarian's assistant that is often seen slithering over bookcases.
- She's never cut her hair before.
- She has no arms.
- Her mom makes her study words 24/7 and participate in spelling bees to gain fame among parents. 209 is sick of it, and wins every year, so she often tries to run away.