Serpentina

She can become a large silver colored snake with red eyes, she looks about 17 feet long in that form. She always uses this form when swallowing her prey.

Arsenal- Medusa Shield: Serpentina is equipped with a large shield for both combat and to block attacks from her enemies. It is powerful enough to block a punch from the Solar Streak Megazord and also block Jenji's Shining Attack. Snake Creation: With her shield, Serpentina can create an army of snakes that can hide in the ground and multiply over time. The snakes will disappear if the shield is destroyed. Stone Curse: When a victim is bitten by her snakes, she can activate her shield, causing all who have been bitten to turn to stone. The victim will be turned back to normal if she is destroyed.

Size Change: Serpentina can change her size at will. Teleportation: Serpentina can teleport to any location at will. Snake Summoning: With a snap of her finger, she can summon an army of snakes. Serpent Strike (or Snake Strike): Serpentina can fire pink-purple lightning beams from her mouth. Misty Tail: Serpentina can turn her lower body into a black colored mist-like tail for an increase in speed. Snake Tail: Serpentina can also turn her lower body into a snake tail. Serpent Transformation: Serpentina can also turn herself into a large snake.
Size changing
Teleportation
Superhuman strength
Snake transformation
Medusa Shield
Snake summoning

Based on a Gorgon monster with a large shield (similar to the Aegis of Athena) for a weapon and was one of the Ten Terrors.
• Head & Hair: True to her Gorgon design, her "hair" consists of a tangled mass of numerous, writhing snakes instead of normal hair strands. Her face is angular, sharp, and reptilian with glowing eyes.
• Skin & Armor: She features a distinctive cold, bluish-tinted skin tone. She wears heavy, highly-detailed ornate gold and dark turquoise armor that covers her upper torso, shoulders, and arms.
• Lower Body: In her standard form, she has a humanoid build, but she frequently morphs her lower body into a long, coiling snake tail for faster traversal. She can also turn her lower half into a dark, smoky, black mist-like tail.
• Signature Weapon: She carries the Medusa Shield (also known as the Gorgon Shield), which resembles the mythological Aegis of Athena. The shield is a massive, mirror-coated buckler featuring a prominent, stylized snake facade at the center.

Additionally, she was extremely arrogant and confident, considering herself invincible, underestimating the heroes and it led to her defeat. Despite all of this, she is good friends with Megahorn. She is predatory, sadistic, and outright villainous.

From Power Rangers universe. Serpentina is one of the two female Terrors and the slyest of the ten. She is certainly one of the most intelligent of the Terrors, which may cause her rivalry with Itassis, who claims that she craves knowledge, not power and as well as Serpentina disrespecting her code of honor. Serpentina is arguably more intelligent than Itassis. She is cold, cunning, arrogant, and will do what she wants and when she wants, even going so far as breaking the "Rules of Darkness". She was also an extremely skilled and sly strategist and manipulator, as she managed to nearly defeat the Rangers by swallowing them, although she was later defeated by the heroes.