Southpaw (comics)
Southpaw (Sasha Martin) is a fictional character that first appeared in the Marvel comic She-Hulk. She is Holden Holliway's granddaughter and in the custody of She-Hulk (and if She-Hulk becomes Jennifer Walters, then Awesome Andy).

She is incredibly powerful because of a gauntlet she wears that cannot be removed. She has a short temper and will often act without thinking (i.e., destroying her high school because they brought back school uniforms, or attacking the Champion because he took a piece of fruit from her).

Fictional character biography
Sasha first appeared in She-Hulk #5 attacking the New Warriors (who were trying to stop her from stealing CDs) sending Nova flying into a building and grabbing Namorita. She was later subdued by Night Thrasher and was taken to the Big House. The Mad Thinker told her to aid them in an escape. They shrank down and stowed away on She-Hulk's hand when the miniature villains escaped. She aided Yellowjacket in subduing the U-Foes after they threatened to kill Holliway. She was later taken with She-Hulk to Skardon to aid the Magistrati in dethroning Champion and unwittingly gave She-Hulk the answer to defeat the Champion.

Future Southpaw

She-Hulk
In a possible future detailed in She-Hulk, Southpaw becomes a lawyer and an active superheroine (inspired by The Gauntlet and complete with a partner/sidekick, Kid Glove) and eventually gets recruited from fifteen years in the future to act as She-Hulk's lawyer when the Time Variance Authority attempts to remove her from the timeline.

Bishop
In Bishop's future someone named Southpaw worked with Hancock in the Summers Rebellion. Whether or not this is the same Southpaw is unknown; this future is portrayed as 70 years in the Marvel Universe's future.

Powers and abilities
Southpaw can use the gauntlet to project energy hands that mimic what her hand inside the gauntlet is doing. These hands are powerful enough to restrain She-Hulk temporarily (although She-Hulk subsequently  played "This Little Piggy" with the energy hand's fingers; this forced Southpaw's fingers open and caused Southpaw great discomfort). The energy hand was certainly strong enough to twist Ironclad's arm. She uses the hands as her main attack method, mainly by grabbing an opponent. She can also perform feats of class 100 strength, but only with her left hand. Her gauntlet's size and shape appears to alter at random.

References

Comics characters introduced in 2004
Marvel Comics female superheroes
Characters created by Dan Slott