I couldn’t verify a specific DeviantArt post titled “Princess Dejah Thoris Barsoomian Summit” by SunfireRanger, so I can only give a careful, best-fit read of the Dejah Thoris/Barsoom themes that such an artwork usually explores.

Likely themes

  • Pulp adventure and sci-fi exoticism. Dejah Thoris is a classic Barsoom figure from Edgar Rice Burroughs’ Martian fiction, so works centered on her often lean into retro pulp space-opera energy, heroic poses, and grand desert-world aesthetics.
  • Royalty under pressure. As the princess of Helium, she often appears as both a political symbol and an active participant in conflict, which gives the character a mix of elegance, duty, and survival.
  • Warrior-princess identity. Many modern depictions emphasize her as a capable, commanding figure rather than a passive damsel, blending regality with action-hero framing.
  • Martian otherworldliness. Barsoom settings commonly highlight alien cultures, ornate clothing, jewelry, and desert vistas, making the visual language feel mythic and heightened rather than realistic.

Common tropes

  1. The noble captive or endangered princess. Dejah Thoris is famously introduced in a vulnerable political situation, and fan art often reuses that tension between status and danger.
  1. The heroic rescuer dynamic. Barsoom stories often pair her with a larger-than-life hero figure, so artwork may echo classic rescue or admiration tropes.
  1. Fantasy pin-up styling. Some DeviantArt portrayals of Dejah Thoris lean heavily into stylized glamour, idealized anatomy, and dramatic costume design, a common modern reinterpretation of pulp heroines.
  1. Civilization versus wilderness. The character’s royal identity often contrasts with the harsh Martian landscape, creating a visual and thematic tension between refinement and survival.

What feels distinctive

What tends to make Dejah Thoris stand out is the combination of old-school adventure fiction and modern character power. She is not just “a princess in space”; she is usually presented as a political, cultural, and martial figure whose beauty is only one part of the image.

TL;DR

The most likely unique themes are pulp sci-fi royalty, desert-survival grandeur, and a warrior-princess reinterpretation of a classic Barsoom heroine. The most likely tropes are endangered princess, heroic rescue, alien exoticism, and stylized glamour art.