If a djinn isn't usually a type of trivia buff then I could just have a different alchemist character be a trivia buff who gets "outsmarted" by Evvie and forced to create her the "most awesomous armor" as Evvie requested if she wins. The armor can be summoned onto her body in a flash of fire over her entire body. It also sparkles when close to fire. Of course it has a huge amount of durability and fire resistance as well.