Color symbolism is also potent. Blue represents stability and truth but also sadness ("the blues"). A sapphire time traveler might be a tragic figure whose blue-shifted travel (a nod to relativistic Doppler effects) isolates her in a frozen, melancholic state.
Zafiro intercepts a transmission from the future—a future that shouldn't exist. It reveals that the TA isn't protecting the timeline; they are farming it, stripping resources from the past to power their city in the present. This violation will cause the timeline to snap back in exactly 48 hours, wiping out humanity. la ultima viajera del tiempo zafiro hdrip