Warframe fanfiction is such a creative playground! One of my favorite OC ideas is a Warframe designed around sonic vibrations, like a bard or composer themed frame. Imagine abilities that manipulate sound waves—sonic bursts that shatter armor, harmonies that buff allies, or dissonant chords that disorient enemies. The ultimate could summon a colossal resonance wave, turning the battlefield into a deadly orchestra. I'd love to see this frame's backstory tied to the Orokin's obsession with artistry, maybe a failed experiment that turned sound into a weapon.
Another cool concept is a 'shadowmancer' Warframe, blending stealth and dark energy. Instead of pure invisibility, it could manipulate shadows to create decoys or phase through darkness. Its lore might involve the Void's corruptive influence, like a Tenno who embraced the shadows too deeply. Pair that with a signature weapon—say, twin daggers that siphon health—and you've got a recipe for some eerie, atmospheric storytelling.