I really wish they put Rubedo in the anime and manga. Haist, what a bummer.

Whose that?

Nigredo and Albedo's sister

ok, cool. i searched nigredo and albedo on google bc i was curious to how nigredo looked like and this is what popped up:

"In alchemy, albedo is one of the four major stages of the magnum opus, along with nigredo, citrinitas and rubedo. It is a Latinicized term meaning "whiteness"."

I love it when authors do this. The relation makes it the more special. Sorry it's just me ranting (づ￣ ³￣)づ