Discussion about Father other delightfulized children identities. (Kids Next Door Theory/Headcanon)
Okay, I'm not sure if this is a new idea within the community, but did anyone have the headcanon that the other delightfulized children of Father were ex-operatives of the Kids Next Door? Specifically, ex-members of the KND organization in Japan and England.
I'm saying this could be a possibility because we never had an answer to the origins of the Interesting Twins From Beneath The Mountain & Rowdy Hooligans From Across The Square. Another thing to consider is the disappearance of Sector Z itself. Do you find it strange that the Kids Next Door's most elite operatives wouldn't have an investigation for their sudden disappearance at the time?
You're probably questioning if The Interesting Twins From Beneath The Mountain & Rowdy Hooligans From Across The Square were ex-Kid Next Door operatives how come they were no references to other missing Kids Next Door operatives or sectors across the series?
To answer that, we have to remember two specific things the ages of DCFDTL/Sector Z & and how recognizable are Sector E and Sector Japanese.
The DCFDTL/Sector Z ages are confirmed to be in the same range as Sector V. These make the members of Sector Z around 10-12 years old. Remember, Delightfulization halts the aging process for any individual.
As for the recognizability of Sector E and Sector JP across the KND organization appears to be slim due to how secretive they are as a result of being entrusted to maintain top private artifacts or info of the KND.
For example, when Nigel visited England, he didn't know the identities of Sector E, despite Nigel knowing every member of the kids next door regardless of the sector, proving that Section E isn't often recognized. The same goes for Sector JP because Father directly states they are secretive.
By combining facts of the ages of Sector Z before delightfulization, the strangest of a lack an investigation of Sector Z's sudden disappearance, the unknown origins of the other delightfulized children of Father, and the lesser-known secretive & entrusted nature of Sector E & JP across the KND organization paint a picture that during the events of 1999 after Sector Z disappearance, there were attempts for investigating the whereabouts for Sector Z over the years.
In summary, I believe during 1999, after the disappearance of Sector Z, the higher-ups of the Kid Next Door received the old members of Sector E and Sector JP for a stealth mission for the whereabouts of Sector Z. Unfortunately for them, along with their journey Father caught them & forcedly delightfulized them and made them into The Interesting Twins Beneath the Mountains & Rowdy Hooligans From Across The Square.
(Post Edit: Another thing to consider is that the Interesting Twins, like the DCFDTL, also have tactical genius, strategies, and advanced technology similar to KND.)
Combine that with many operatives at the time who probably knew about Sector E, JP, and Z being near the age of decommissioning, the multiple waves of mini rebellions across the year 1999, recovering the after the event of the Great Junior High Rebillon, and the rise of chicken pox. Having time for finding the members of Sector Z were put on hold for a while (especially after losing more operatives while on the investigation) until the KND had forgotten about them or considered finding them a lost cause.
Side Note: Anyways for anyone curious about how long Sector Z was delightfulized for, the answer is around six years. The series finale in the universe is in 2005. Here's a timeline I made. (Sorry if one of the images is bigger than the other.) What are your thoughts on my theory/headcanon on the other delightfulized children being KND ex-operatives?