The thing is, that Sel is also a narrator.
Why would HE whisper into his own creations heads? Not that i think it's impossible but very unlikely.
Another thing is, that for ambiguous/unknown characters Sel uses a standard color for their name in renpy, which is a reddish tone.
Now, Sel uses for himself but interestingly also for Sekai an identical red color value different from the standard one.
/e
For refenrence: red in HexDec is #ff0000
Those get the standard reddish color:
define seven = Character("73 65 6b 61 69")
Different from, lets just take Maya:
define m = Character("Maya", color="#18b500", who_outlines=[(absolute(2.5), "#000", absolute(0), absolute(0))])
Now Sel and Sekai and a parrot?
define se = Character("Sekai", color="#96001B", who_outlines=[(absolute(2.5), "#000", absolute(0), absolute(0))])
define parrot = Character("Parrot the Parrot", color="#96001B", who_outlines=[(absolute(2.5), "#000", absolute(0), absolute(0))])
define red = Character("Red", color="#96001B", who_outlines=[(absolute(2.5), "#000", absolute(0), absolute(0))])
define sel = Character("Selebus", color="#96001B", who_outlines=[(absolute(2.5), "#000", absolute(0), absolute(0))])
/e2
So, i mentioned it some time ago, red moons in japanese culture are associated with, lets boil it down, desaster.
It fits for Sekai given the story so far.
Don't know what the parrot was about.
That Sel gives himself that specific color is interesting and i have to ask myself if he sees himself that way.
I know that he knows that he has his flaws and whatever.
I wonder if he's going introspective there.