Minou.Love.Moi

Let's not forget that Lucifer used to be an angel called Lucifel (literally "the one who carries the light") who fell from Heaven and became the Devil.

goofy ahh ladynoir

it is by the 2013 bible does the design we know as "Felix" start to transition into "Adrien" (even though he has been Adrien since the beginning.) the plot that he desired to become a doctor was officially dropped at this point for a new, less complicated goal...

There is particular emphasis on how he insists on wearing casual clothes.

He is far more rebellious, and actively tries to skirt his father's goals for him. Piano and Art had carried over from previous bibles, but was allocated to "things his father wants from him"

Adrien still has a bit of a bitter personality. He is still very Felix.

Him and Marinette are explicitly lined as friends. This is wildly different from the later bibles, which change this line to...

(this is the 2014 pitch that went forward into the series)

Adrien's "miraculous" is actually his cane. not his ring.

Adrien was also meant to have a better relationship with Fu, and seemed to even admire him.

Gabriel was far more interested in Adrien's wellbeing than he seems to be in the current show

“I should have died that day.  If he hadn’t shoved me off that roof, I probably would have.”

“But he saved your life.”

“He did.  But I can’t help but wonder, if I held on just a little longer…” Comic for chapter 8 of The Tailor, which you can read here!