Ziggy Grover

Ziggy Grover is the Ranger Operator Series Green, alternately referred to as Green Ranger. His zord is the Tail Spinner zord which is a combination of an orca and a scooter. His operation number is four. He is generally clumsy, wacky, silly, and a bit of a coward, but for what he lacks in skill and physical prowess, he makes up for with heart. He is energetic, enthusiastic, and relentlessly (at times stupid) optimistic, which often leaves him on the receiving end of Dr. K's blunt verbal insults. He usually wants to stay out of trouble, but won't hesitate to help the other Rangers.

Before becoming a Ranger, he was an associate of Fresno Bob, the boss of the Scorpion Cartel, a well known crime family. Clumsy even back then, he would often fail missions, but continued to work under Fresno Bob in order to help support an orphanage full of children with "child gamma sickness". One day, Ziggy and a truck Fresno Bob had entrusted to him disappeared from Corinth City, thus giving a reason for many criminals to target him. Ziggy had discovered the truck was full of $5 million worth of medical supplies, which he secretly diverted to the orphanage. With the help of one of his friends, he then fled Corinth. It was outside that he met Dillon, and after failing to hijack his car, decided to escort him back to the city. Ziggy views Dillon as his best friend and was the first person to help Dillon search for his sister, later joined by Summer.

When Fresno Bob's men intensified their search for him, Ziggy started to become more concerned about his well-being. He is later kidnapped by Tenaya 15 and is the ante for a favor with Fresno Bob. Despite that. Ziggy rescues Fresno Bob after he is double-crossed by Tenaya; because of this, Fresno Bob absolves Ziggy of his debt.

Ziggy, unlike the other Rangers, was never tested and is the least capable to use the Ranger tech. His becoming a Ranger was the result of a desperate effort to keep the Series Green morpher from Tenaya 7; he felt that the best way to keep the morpher away from her was to bond with it himself, thus becoming Ranger Green. His unauthorized bonding with the morpher initially did not sit well with Dr. K and the other Rangers, except for Dillon, due to his obvious incompetence at the beginning. Since then, however, he has been steadily showing signs of improvement, proving to be a helpful -though clumsy- ally, able to hold his own quite well in combat situations, morphed or not. He even started bringing his once problematic transportation powers under control, once heroically diving off the top of a skyscraper to save Dillon by way of teleporting both of them mid-descent to ground level safely.

Dr. K initially found Ziggy to be quite annoying, and she was openly hostile to him. Even after she begins to open up upon Gem and Gemma's return, she remains frosty to him, often refusing to call him by name as she began to do with the other Rangers. Ziggy, however, seems attracted to Dr. K; in the episode "Dome Dolls", he admitted to her he had a dream where he was on a date with her. He has also expressed a mild attraction towards Tenaya 7, once stating, "When she's not pounding us into the pavement, she's kind of a hottie." Soon enough, it becomes obvious that Dr. K does actually think well of Ziggy; she accidentally once called him by his first name in front of Gemma and even named her password after him, which Summer figured out (though she lied to the other Rangers about it to keep Dr. K's secret safe). When Ziggy and Dr. K were teleported to a cave with little oxygen, he managed to get her to smile by doing a shadow puppet show for her. When Venjix took over the city, he immediately got extremely concerned and left the other Rangers to protect Dr. K and stayed with her when the others went after Venjix.

After the war, Ziggy and Dr. K announce they are opening a children's school, where Dr. K will teach biofield physics and Ziggy will teach shadow puppetry and cooking. She also finally refers to Ziggy by his first name, saying that since he is no longer a Ranger, she needs to call him something. She also seems to be able to finally admit to her feelings for him, or at least tolerate his feelings for her, allowing Ziggy to put his arm around her.

Ziggy later joined his teammates in traveling to the main universe's Earth in Super Megaforce to join an army of Power Rangers who fought against the Warstar Armada.