Ship Leesoo (십이수, Shib Yisoo; "Shibisu") is a D-rank Regular. He is relatively weak, yet possesses a great ability to deduce and an intellect on par with Koon's. Nonetheless, he made it past all of the tests on the Second Floor, where he was assigned the Scout position and is now climbing the Tower as the leader of his team. He is currently on the 39th Floor.
(While facing Ho and Serena Rinnen) "Thought infuriating, it's true. Since I'm not very strong. But - I've at least got the guts to stand my ground even in the face of death. So you better be careful."
(To Anak Zahard) "I don’t know what you’re hiding from me! But I know enough to say this! You are in the same place as me right now! And you are in the same team! I am your friend standing by you right now! I don’t know what kind of a past you had or how great of a future you might have, but the person who’ll stand by you right now is ME!"
(To Koon Aguero Agnis) "In the end, the reason why those who stole from me did it was just because someone else stole from them as well..."