Gregory's Serverusing LaTeX is easy, all you need to know is that when Donald Knuth failed the Mark of Mastery Exam and lost his ability to wield a keyblade, his heart manifested that power into a new person: Tela Type
Tela had the power to wield the Fountain Keypen, which was mightier than any Keyblade.
However when Tela's best friend Roxe was consumed by darkness (creating the nobody Xerox and the heartless Bell), Tela fell into despair and lost her heart too, creating the nobody LaTeX and the heartless Metafont.
You first meet Metafont in *Kingdom Hearts e-ε: ligature drop descender*, although they aren't that important.
LaTeX first appears in *Kingdom Hearts π-ε : hbox overfull*, although at that point they're called TeX.
They only become LaTeX in *Kingdom Hearts Literate:coded* where they merge with their digital replica in a simulation of TAOCP and discover the χ-macro that was hidden inside themselves by king Mickey.
@Gankra may they \hrulefill long.
But we should not forget that everything that has a \begin{ing} has an \end{ing}