Achilles' Heel: The Zaibach stealth cloaks only function at full potential on solid terrain. Recognizing this from past battles, Van takes Escaflowne out into a river where the moving water will render that stealth movement ineffective. Dilandau even grudgingly concedes it was a clever move.
Chekhov's Skill: Millerna's medical studies, which she was forced to drop due to familal interference, make her the only one qualified to treat Allen's injuries.
Foreshadowing: Varie Fanel's fate after entering the forest to search for Folken.
Half-Human Hybrid: Van and Folken are both revealed to be half-Human and half-Draconian.
Origins Episode: The first half of the episode delves into Van's backstory, showing how his parents met and the origin of his wings.
Uncertain Doom: Whether Varie Fanel was killed by the dragons or not. It won't be definitively confirmed until the second half of the series.