Serious attends Amelia's class at the Magic Academy, functioning as the pragmatic counterweight to Leon's fiery competitiveness. He consistently adopts the straight-man role in their dynamic, tempering Leon's impulsiveness with grounded, logical responses. His significance escalates when the academy crashes, shattering a demon seal and unleashing ancient horrors into the forest. Defying faculty orders to remain on campus, Serious joins his peers to retrieve scattered fragments of the damaged floating device, prioritizing collective responsibility in resolving the crisis.