- Nico appears in the artwork for and is quoted in the descriptions of and . She also appears in the artwork for and .
- Nico is the daughter of the Arthur from the world of Xmas Shooting - Scramble!!.
- Additionally, in the world of the original Xmas Shooting, also has a daughter named Nico.
- Nico is either 11 or 12 years old.
- Nico's birthday is December 25th.