Charlie

Charlie was the leader of the A-Squad Rangers, and she is the first known female to become a Red Ranger.

Biography
Charlie was the arrogant leader of the A-Squad - she never interacted with the B-Squad (they didn't even know she was a woman) and would later show contempt for them, saying they're "not fit to shine our boots". SPD was unaware of this arrogance, thought Bridge once noticed that something was "off" about her aura.

As A-Squad leader, she dealt with the more serious attacks on New Tech City and Earth. She destroyed the first of Broodwing's robots in "Beginnings".

Before Emperor Gruumm attacked Earth, he sent his forces to the Helix Nebula in order to draw out the A-Squad. Charlie's teams was dispatched but, shortly after, she sent a garbled distress signal as the team was overrun. SPD continued to search for the A-Squad but Anubis Cruger feared they'd been killed in action. ("Walls", "Dogged")

In reality, Charlie and her team had betrayed SPD and joined Gruumm - Charlie would later say "everyone wants to be on the winning team". On his behalf, they attacked and slaughtered the SPD outpost on Gamma 4.

Later, the squad faked having crashed on Gamma Orion and were "rescued" by the B-Squad (Charlie was pissed at Jack being surprised she was "a girl"). Once they were back on Earth, Charlie kidnapped Cruger and took him to Gruumm's warship; she didn't care when Cruger denounced them as Rangers.

Her next act was to call out the B-Squad to meet them in battle, where Charlie and her Rangers pounded them into the dirt and mocked them. Unfortunately for Charlie, the B-Squad activated SWAT Mode and improvised tactics, and Charlie was taken down by Jack Landors. Charlie summoned a spare Zord to continue the fight and helped destroy the Delta Squad Megazord, but a rematch with the SWAT Megazord blew it to pieces. Her last words before being arrested was an outraged denial that B-Squad could "do this" to the A-Squad.

Before the Zord battle, Charlie had said "then we'll take care of Broodwing" - A-Squad then proceeded to stand around doing nothing until B-Squad came back...

SPD comic strip
The UK's Jetix Magazine SPD strip had a different finale to the show: there, Charlie was brainwashed instead of corrupted. The B-Squad defeated her team and were later promoted to A-Squad themselves.

Arsenal

 * Delta Enforcer

Zords

 * Delta Runner 1 (formerly)

Trivia

 * Charlie is noted as being the first female Red Ranger in franchise history (next was Lauren Shiba from Super Samurai). Bruce Kalish and Greg Aronowitz had asked if they could make the B-Squad Red Ranger a girl; Disney gave a very firm no and were initially uneasy about making A-Squad's Red a woman. That's why Charlie's voice is distorted in "Walls": if Disney had said "nay", she could have been made into a man.
 * Super Sentai would have its first female Red Ranger in its 33rd entry, Samurai Sentai Shinkenger, when the real 18th head of the Shiba Clan, Kaoru Shiba, assumes leadership of the Shinkengers.
 * Charlie and her team are the first Rangers to willingly join the main villain.
 * The A-Squad helmets are copies of the Power Rangers in Space helmets, with the uniforms being recycled motocross gear.
 * Charlie is the only A-Squad Ranger to have an official name mentioned - and that only in the closing credits and Gina Valera's CV.
 * Charlie is the forth female ranger leader of any Ranger team, after Delphine, Jen Scotts and Taylor Earhardt (before Cole replaced her).