Data Ravelさんのイラストまとめ

Considering that other "fantasy of the Digicore" ended up being DORUgoramon and Ouryumon, there's a theory that Alphamon was the knight thought by Ragna Lordmon's digicore, being the reason for the various "Nabe-ken Red" without an X-Antibody relationship

Although they aren't always used for X-Antibodies, at least directly
For Rust Tyrannomon As'maria wasn't sure if this would be an X-Antibody, there was a slight difference in coloring that can be interpreted in many ways such as a sensor light or Digicore
https://t.co/yjsxRan9L1

Although this design choice wasn't followed by everyone, there were some variants of it. As'maria decided to mark X-Antibody designs with green coloring. Those markings ended up being known as "As’ma Green" and "Nabe-ken Red"
https://t.co/E76zRmeEyz

In order to identify his Digimon as X-Antibodies, Kenji Watanabe gave red marks to his designs, which was the "X-Antibody Mark" (X抗体のマーク) and was red because of the LED color of the X-Antibody Indicator used in the Pendulum X
https://t.co/vmi0KkeL1F

The crest in the forehead of DORUmon and Ryudamon is the "Digicore Interface" used in the Prototype Digimon as access to Digicore information allowing for easily controlled overwriting. That hasn't always been the "meaning" of the said crest as explained in interviews

This one is more about trying to find out the origins of the X-Program and the X-Antibody, because a very important aspect of it, Death-X-Evolution, is supposed to be in fact old technology that existed during the genesis of the Digital World

Abbadomon
The negative law of the Digital World, is its apoptosis-inducing factor that wants to reduce everything into nothingness.

It's a bit curious that after all, Omegamon does appear to fight those nothingness-inducing enemies, and it all started with Diablomon.

Apocalymon
"It brings the terror of the apocalypse, the ultimate form of nothingness"
Ordinemon
A Digimon who spreads miasma attempting to save the world reducing it to nothingness.

That loneliness might have had a huge impact on the relationship between him and his Digimon, it could have been unstable, dependent, or just one-sided, maybe it was full of misunderstandings. The possibilities of the first partnership, that is what they want to talk about.

Lastly, she says that Digimon fans should be more open-minded and enjoy Digimon, any work with "Digimon" are like brothers that are all in the same huge world, and every person can find something that they enjoy somewhere there.