Satiko Suzuki (鈴木 早智子, Suzuki Satiko) is an NPC from the first Metal Slug. She appears in single-player mode's end credits. Apparently, she is praying for a UFO to appear. It seems that she wants the aliens to resurrect a loved one killed during the war. Maybe her lover could be one of the Rebel soldier. It is also possible it was her father.
Satiko makes cameos in Metal Slug 2, Metal Slug X, and Metal Slug 3 as debug elements. In Metal Slug 2/X, Satiko functions as a spawn pointer that moves depending on the screen position. In Metal Slug 3, she stands on a couple of crates in the "Mee Her" test stage. Satiko is also available as a Steam trading card for the first Metal Slug.
Her sprite (with charm) returns to anoint the title screen of Metal Slug Defense after you beat the first world. Upon tapping the screen, her hat flies off. If tapped lightly enough, or held down to prevent entering the menu, Suzuki will remain shivering and hatless.