Portrayed by Mason Alexander Park, Desire is an androgynous, menacing figure who materialises as whatever one desires the most. Incredibly vane, it makes sense that Desire's domain (called the Threshold) is a statue of itself, and their sigil is a heart made of cut glass.
Desire has a habit of meddling in their siblings' affairs, which often puts them at odds with Dream and explains why they're an antagonist in the Netflix series.