Wandering Mother Base Soldiers

Ten former members of the Militaires Sans Frontières' Mother Base were present during the events of the 1980s.

Biography
They had acted as members of the Militaires Sans Frontières. However, after Mother Base was attacked and destroyed by XOF and Skull Face, they went into hiding. Their years in isolation made them extremely erratic, lashing out constantly and moving erratically.

By the time of 1984, Venom Snake encountered them during his operations in both Afghanistan and Africa and, after Kazuhira Miller recognized them from the old Mother Base, proceeded to extract them at Miller's request. They also carried memento photographs from their time at Mother Base before its destruction, which they then proceeded to "show" Paz (or rather, a hallucination of her).

Behind the scenes
These soldiers are the subject of the side ops Wandering Mother Base Soldiers series in Metal Gear Solid V: The Phantom Pain. They are shown to move in a very similar manner to the Parasite Unit, although it is strongly implied that their erratic behavior was due to being isolated for a very long time from going into hiding. These side ops are also necessary for a subplot involving an apparently amnesiac Paz and showing her photos to see if they can jog her memory.

A similar character named Mosquito was later encountered in one of the main chapters who shared a similar backstory to them, although he was shown behaving in a less erratic manner.