Abigail is a unit original to Metal Slug Attack, first appearing in the Extra Ops titled Sand Locker (as a pre-acquisition unit, obtained by purchasing 10,000 medals). As that event has finished and she is no longer a part of the Medal/VIP Crank, parts can only be obtained through the Extra/Rare Shops and the occasional Event Crank. She is the first female Rebel Army character to be introduced to the series. The Patrol Robot can be considered a cheaper version of Abigail, as it shares the same effects as her, but has less health, lower AP, and a longer firing time.