Yi sang is a particularly quiet, mellow man. He fails to stand out much among his fellow sinners 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. His expression never shifts much either, and he is yet to express any strong emotions.

Nevertheless, Yi Sang does not come off as unkind. He appears to care for the people around him in his own way.