Rumi is portrayed as a tall, athletic young Korean woman with a striking appearance often described as classic beauty. Her signature feature is her long, vivid purple hair, typically styled in a thick braid that cascades down her back.

Rumi's personality blends star-power with emotional depth. Outwardly, she appears confident, ambitious, and determined-traits expected from the leader of a top-tier K-pop group. She presents herself with grace and authority, often stepping into the role.