The whole fandom was crazed when Mothy dropped the Len bomb, wherein new Len characters came out of nowhere. This includes Punishment and Irregular (who was previously theorized as Allen Avadonia). A theory had already been made upon their debut, theorizing who/what they may be. And later on the line, the executor of Kayo Sudou was revealed (or was it suggested?) to be played by Kagamine Len.

The latest in the news of this Kagamine spree was last week. It was confirmed that Marina's twins survived; giving us two sets of god fragment-twins. Knowing this, it made want to tie the knot and connect these new information to the Four Endings of Evillious. 

Let's begin with what we know:

There are four Lens associated with the Four Masters:

• Hansel (Pollo; Pierrot) - servant to the new Master of the Grave Yard

• Allen (Kayo executor?) - successor of the Master of the Heavenly Yard

• Punishment - an atomic bomb who is the brain child of the "Master of the Hellish Yard", Nemesis

• Irregular - fetus of the new "Master of the Court" (Isn't Michaela still alive?)

There are two sets of twins who survived Project MA:

• Hansel & Gretel - 2nd project reincarnations
• Allen & Riliane - 6th project descendants

And here comes my first 2 theories:

• The twin fragments cannot be reincarnated together unless the two parents of the project (the witch-mother & the scientist-father) or their descendants have children.
• Love is something the twin fragments sprinkle upon project descendants in order to be reincarnated and walk in the earthly realm.

The first bullet is proven by Ney Marlon, who was the daughter of Arth Lucifen but was not conceived by another blonde character, hence Ney doesn't have a Hansel nor does she look like a usual Gretel reincarnate. The second bullet is for me to prove my set of theories below.

Third theory:

• Punishment and Irregular also came from the failures of Project MA.

Punishment theory:

• I think Punishment is the son of the 5th project, the project that failed since only one child was born.

• I think his witch-mother is played by GUMI while his scientist-father is played by Kamui Gackpo, two vocaloids who still haven't appeared in the Original Sin Story.
• Punishment died a virgin.

The first two theories for Punishment is backed up by two facts:

(a) that although Punishment is Nemesis's brain child, the army was assembled and previously lead by none other than Gammon Octo. This basically means that Punishment could not exist without Nemesis's mental means and Gammon's physical means.

(b) there is a recurring infatuation shared by the two vocaloids in the story; almost as if Punishment is finding a way to get back to this world. One example for this infatuation was by Sateriasis Venomania, who was in love with Gumina but failed to get children. The other one was by Nemesis Sudou, who was in love with Nyoze Octo, a descendant of Venomania and in the end, died.

The last theory for Punishment is the reason why he can't get reincarnated by natural means, unlike Allen and Riliane.

And my Irregular theory:

• I am upon agreement with the Cain and Abel theory, which states that Irregular is the son of Eve Zvezda and Adam Moonlit. But I don't agree that the other half is Punishment (see Punishment theory above). But I do agree that Cain and Abel might still exist since it was confirmed that they fully formed and even had their real names.
• But instead of natural birth or mental birth like the twins earlier, I think Irregular (Or Cain?) was born by mechanical birth. The "Soul of Adam", Gear, sacrificed his soul in order to make the former body of Eve's soul, Clockwork Doll continue to live, and miraculously, conceive a child by virgin birth. (Get ready for some blasphemy) This theory makes a Biblical theme for Miku and Kaito: once as Adam and Eve and now as Joseph and Mary. The clockwork tower that Gear powered could be seen as the Holy Spirit that entered through Mary, creating the world's savior.
• This holy demeanor for Irregular makes me think that he's Abel. But who's Cain? That I haven't thought about.
• But I have thought that maybe Cain's the collection of other Rin characters throughout the Evillious era, but I don't have any facts to back my claim.

In conclusion, I theorize that there are four sets of children:

• Hansel & Gretel - 2nd project reincarnations
• Allen & Riliane - 6th project descendants
• Cain & Abel - 1st project fetuses
• Punishment - 5th project bomb

And four parents in Project MA who conceived the children:

• 2nd project - Seth Twiright & Meta Salmhofer
• 6th project - Vey & Marina Lucif
• 1st project - Eve Zvezda & Adam Moonlit
• 5th project - Unknown Gumi Witch & Unknown Gakupo Scientist