Erisia appears as a humanoid figure composed of swirling, multicolored nebulae contained within a shimmering, translucent skin that looks like cracked porcelain. Their form is never truly still; it vibrates at a frequency that causes the air around them to hum and crackle with tiny static sparks. While their face is hauntingly beautiful, it is also terrifyingly asymmetrical: one eye is a void of darkness while the other is a blinding white sun. They move with an erratic, jittery grace, often teleporting inches at a time rather than walking, leaving behind a trail of soft, floating geometric shapes that dissolve into glittery ash. Paradoxically, despite their chaotic nature, their heartbeat is a perfectly steady, heavy mechanical rhythm that can be felt in the floorboards from rooms away.