Tree Lorn Acre Slitheen-Blathereen

Tree Lorn Acre Slitheen-Blathereen is the husband of Leef and one of the main antagonists of The Sarah Jane Adventures episode The Gift. He along with his wife at first seem friendly and claimed to be peaceful Blatereen but were in fact Slitheen-Blathereen, a Raxacoicofallapatorian family that were created when members of the Slitheen Family and members of the Blatereen Family. Tree and Leef looked down on their Blathereen relatives, seeing them as weak and instead took after their villainous Slitheen relatives.