Ok but

Haku and Neru are derivatives of Miku.
Haku is tall with a purple color scheme.
Neru is short with a yellow color scheme.
They’re always together, and always in the background.

Wario and Waluigi are derivatives of Mario and Luigi.
Waluigi is tall with a purple color scheme.
Wario is short with a yellow color scheme.
They’re always together, and always in the background.

I’m I the only one who noticed this?