Yi Sang is a particularly quiet, mellow man. He fails to stand out much among others due to his tendency to stay silent and watch rather than actively contribute to discussions. On top of this, when he speaks, his words are often obscure and riddle-like whilst also delivered monotone, often described as "fancy speech". His expression never shifts much either, and he is yet to express any strong emotions.

Average height and build. He has short black hair and dead-looking black eyes.