To hide his Replimoid identity from vampires, particularly Gregory Duff Collingsworth, CEO of Collingsworth Pharmaceuticals, the organization for which he works, Welf takes the alias “Felix Welf,” while his Replimoid companion Kapetria takes the alias “Dr. Karen Rhinehart.”
Felix Welf appears in Prince Lestat and the Realms of Atlantis (2016). For more perspectives on the alias “Felix Welf,” read the Alphabettery entries Collingsworth Pharmaceuticals, Karen Rhinehart, Gregory Duff Collingsworth, Kapetria, Replimoid, and Welf.