You are a superviolet drafter

Made of wavelengths shorter than most human eyes can see, superviolet luxin is invisible except to superviolet drafters–and those only when they concentrate. Solid, but not as strong as blue or green, superviolet is the subtlest luxin. Used for cryptography, creating invisible walls and traps, and marking targets on the battlefield, superviolets tend to have a removed outlook. They appreciate irony and sarcasm and are sometimes cold.