Now that his age is confirmed to be 21 on the Korean website and is listed as 21 on this page, I don't think there's any need for that bit of trivia anymore.
Topic on Talk:Mad Paradox
From Elwiki
I just edited the trivia so that it still makes sense for it to be there... but it can still be removed if it really feels unnecessary.
I also rearranged all the trivia so it becomes a bit more cohesive... I tried to follow the logic of lore->age->appearance->personality->etc