He realized his mistake about ten seconds after the words left his mouth. He was unarmed, and if by some chance his perceptions had somehow tricked him, or if the person whose presence he noticed hadn't noticed him, he had just tipped his hand. Potentially fatally.

Enjolras peered through the mist, but there was nothing for it. Without pressing forward, possibly into a hostile presence, he would never know. Without pressing forward at all, however, he would effectively trap himself, blinded as he was. He resisted the urge to sigh and took a resigned step forward.

"You have nothing to fear from me. I am unarmed." And even if he were, he was well aware that even as a Victor, he wasn't a match for a good number of the Tributes anyway.