Although on the surface Leesoo seems to have no special or extraordinary qualities about him, he is a man with many hidden depths, he has improved greatly over the first timeskip and shouldn't be underestimated. His shinsoo resistance has improved drastically over the course of eight years; in Part I on the Floor of Test he struggled greatly trying to get through the shinsoo barrier imposed by Lero-Ro but in Part II he was shown to easily move around and navigate through the shinsoo pressure of the 30th Floor.