Tropes present in this episode include:
- Character Action Title: The titular "girl on the battlefield" is May Chang, a princess experienced in martial arts and alkahestry. It could also apply to Lan Fan, Hawkeye, and (in prior episodes) Winry.
- Internal Reveal: Edward, Alphonse, Roy and Dr. Knox learn from Ling that Führer Bradley is a homunculus.
- Love Epiphany: Ed promising Winry that "The next time I make you cry, they'll be Tears of Joy" makes Winry realise that she fell in love with Ed a while ago.
- Roaring Rampage of Revenge: When he realises that Mustang is in the room, Gluttony goes on one against him for killing Lust.
- Unwitting Instigator of Doom: Dr. Knox referring to Mustang by name triggers Gluttony's Roaring Rampage of Revenge.
- What the Hell, Hero?: Knox berates Ling for letting Lan Fan travel in the sewers right after removing her arm, which could have exposed her to infection.
