Energists -- Gaia's power source. It is a refined form of the Energist
mineral, and the redder it is, the stronger its power. A Drago-energist is
formed by condensation as the dragon eats the mineral throughout its life.
Now, it was explained at the beginning of the story that guymelefs are
powered by energists. It's obvious that Escaflowne has an energist on its
chest and a Drago-energist within it, but the green stones on its shoulders
are also energists, meaning Escaflowne has a total of 4. Small wonder it's
so powerful... (By the way, Sherazade and Dilandau's melef both have 2, and
Alseides have (had) 1.)
The opening and the ending visuals supposedly contain Hitomi's feelings and
Van's feelings, respectively, as they change throughout all 26 episodes. The
ending is rather figurative, but the opening, especially, contains elements
from every part of the show. Does that mean that there will be a battle
between Escaflowne and Sherazade? We'll see...
"Say, it would be neat if this thing turned into a dragon." Escaflowne got
its wings by this one whim from its creator, Shouji Kawamori (incidentally,
also the creator of Macross).