Walhart is the emperor of Valm, the continent west of Ylisse, uniting the continent by force.
Two years after the defeat of Gangrel, Walhart has all but completed his conquest of Valm. During this conquest he took over Rosanne, leading Virion and Cherche to flee Valm to seek aid from Ylisse and Ferox. Walhart also attacked and took over Chon'sin, killing the parents of Yen'fay and Say'ri. He took the green Gemstone, Vert, and brought it to Valm Castle. After Say'ri left Chon'sin to oppose Walhart, Yen'fay offered to ally Chon'sin with Valm as long as Walhart did not kill Say'ri. Walhart in turn made Yen'fay into one of his generals.