Analysis of information sources in references of the Wikipedia article "Nemesis (Resident Evil)" in English language version.
We inevitably decided on this final ability due to the presence of Ganado in Resident Evil 4. Ganado are humanoid enemies that are created through being infected with the Plagas parasite, the original basis for NE-α. When the Plagas activates, it spawns from the neck of its host in the form of a tentacle. NE-α was created to imitate this parasitic quality. We wanted NE-α infected enemies to be visually similar to the Plagas-infected Ganados as a means for fans to piece together how Nemesis fits within the whole Resident Evil franchise.
We inevitably decided on this final ability due to the presence of Ganado in Resident Evil 4. Ganado are humanoid enemies that are created through being infected with the Plagas parasite, the original basis for NE-α. When the Plagas activates, it spawns from the neck of its host in the form of a tentacle. NE-α was created to imitate this parasitic quality. We wanted NE-α infected enemies to be visually similar to the Plagas-infected Ganados as a means for fans to piece together how Nemesis fits within the whole Resident Evil franchise.