In the beginning, it was coincidence that three particular random events occurred simultaneously in three very different worlds. Lucca Ashtear was unveiling her newest transportation device at the Millenium Fair. Lilka Eleniak was preparing a Teleport Gem for her next destination on Filgaia. And at a celebration party somewhere, Viki sneezed.
The resulting dimensional rift in the time-space continuum brought all three to a small pocket dimension uninhabited by sentient life. Surprised and distraught, the three young women set to work trying to open a portal to their individual homes.
The brilliant mind of Lucca Ashtear led them through the scientific rigor of testing various devices powered by both physical and magical forces. Lilka, though still an apprentice mage, had studied enough to break down the normal processes of magical teleportation and dimensional travel. Viki, eager to help, was in charge of making tea.
After a few attempts at dimensional travel that had only succeeded in transporting items like trees, bicycles, and an abandoned space station to the pocket dimension, the group finally created a stable portal. And to their fortune, the first thing to come falling unceremoniously out of the portal was the revered Lenneth Valkyrie, who was on her way to a time-shifted Midgard in pursuit of a vagrant time-travelling deviant. Some reports of this incident recall that Viki had once again sneezed.
With the help of an all-powerful Creation Goddess who was in hurry, the group began to open multiple portals to all kinds of different realities. While some were not so friendly, quite a few of dimension-displaced victims were quite adventurous. Exploration of the small pocket dimension began. As more and more ammenities became easy to attain, some of ever-expanding group began to grow attached to the world.
Indeed, after returning to their home dimensions for some much-needed world-saving, each of the original founders ended up coming back to the pocket dimension's tranquil atmosphere. A vacation spot of sorts for some, a chance for entrepeneurship for others. It wasn't long before the more battle-minded visitors set up a tournament, using the pocket dimension's multiple portals to invite champions from all across the multi-verse. It ended up being quite a profitable spectator sport.
To this day, Lucca and Lilka (and by honorable mention, Viki) remain the go-to experts on DL Portal Management, though with the enormous amount of technological and magical experts visiting the realm, the system is hardly ever in need of repairs. Many scientists throughout the multi-verse have hailed the DL's engineering department as a bastion of education, and applauded the use of the DL's profits from its Sporting division to fund their research efforts.
Dr. Ashtear proudly stated in a recent interview, "The only thing the organization spends more on than the Transport Research department is the DL Medical division... And when you consider the amount of casualities and creative methods of destroying eachother the Duelists have devised, the focus on White Magic and Cloning technology really becomes a bigger priority."
-Except from "History of the DL" Documentary, Part one
This is kind of how I imagine the DL... A little bit more light-hearted than most, maybe?