The 'Noelle Is Trans' or 'Noelle's Antlers Debate' refers to a viral discussion within the Deltarune fandom concerning the character Noelle Holiday. The debate began when fans pointed out that Noelle, a female reindeer, possesses antlers—a trait often associated with male deer—leading to the popular headcanon that she is transgender. This observation quickly spiraled into an ironic internet phenomenon, characterized by fans using red circles and arrows to point at her sprite while asking 'Is she stupid?' or 'Is she trans?'. The meme eventually transcended the Deltarune community, parodying the obsessive nature of gaming theories and 'brainrot' culture, with users applying the same antler logic to various other fictional characters across different media.