: Angered by humans using his library for war, Wan Shi Tong decides to sink the library into the Spirit World, trapping everyone inside.
: A scholar whose remains are later seen in the sequel series, The Legend of Korra , implying he never left the library.
: The Gaang manages to escape just before the building disappears, but Professor Zei chooses to stay behind to continue his research.
: Angered by humans using his library for war, Wan Shi Tong decides to sink the library into the Spirit World, trapping everyone inside.
: A scholar whose remains are later seen in the sequel series, The Legend of Korra , implying he never left the library. [S2E10] The Library
: The Gaang manages to escape just before the building disappears, but Professor Zei chooses to stay behind to continue his research. : Angered by humans using his library for
