Frost

BIO: Frost is the oldest out of all his siblings. He has ice powers, which allow him to control and summon ice from himself. Due to his alpha powers over his siblings, one of his many powers makes him have very influential emotions (Can make the people around him feel the same emotions he does, so long as they are intense. Eg, making others cry) He's also the leader of his team though he and his sister Night both take leadership. 

Behavior: Brave and confident int his power, but he's easily exciteable. Kind of like a golden retriever dog. 

Main Story:

After being taken away and seperated from his siblings, Frost is locked in a facility where a lot of weird creatures, mutants and aliens were captured. Sort of like a weird zoo but only nobody was allowed to see this place. He is kept there for quite some time, until he is around 19 years old. One night while it was feeding time, Frost managed to escape by trapping his feeder inside the cage and running off towards the exit.

Of course that doesn't go unoticed, Frost is immedietly alerted by the blaring alarms, he manages to escape through a rooftop, flying away. But as he is flying, he sees a net flying towards him, in a second, Frost ends up tangled up in the net and falls straight for the ground, cracking the gem on his forehead. This causes his mind to lose a lot of his memories, Rathrians store all information into their gems, their gems are like their brain and heart together. So once he wakes up on the next day he would have forgotten about what had happened.
*From then, his gem still doesn't have the small gap like in his design, it's just a small crack that gradually increases until a small piece falls off.

Frost stays unconcious for a few hours, but wakes up seeing he is still trapped under the net. Luckily the men from the facility did not find him, so he had enough time to run off to somewhere far enough from these goons. As he's running around, he spots a dock area nearby, there were a lot of boats and Frost took the one which was closest, hiding in the storage area.

Frost is stuck on the boat for a few days, until the boat stops, he finds himself in Japan, to him it is unclear where he is, as he had never traveled anywhere, besides out his own house. He gets off the boat, and secretly flies off towards the more wild area of Japan, where not a lot of humans would see him and freak out over a giant almost 7 foot tall lizard walking about their city.

From then on Frost lives in Japan, slowly forgetting a lot of things about who he  is, and who his family are. He lives alone for the most part, venturing the forest to find himself some food. At one point he meets the Ancient One, who usually would leave him some food at the front of his home, Frost is a bit skiddish around anyone new, especially humans as the only memory he seems to remember of human interaction are the evil goons from the facility. 

Later on

(this is around TMNT 2003 season 4, ep14)

One day while exploring the wilderness, looking for some food, Frost spots a small turtle guy wearing a hat and vest. That said turtle is Leonardo he seemed to be in a fight with two snow giants. Frost only observes from afar, watching the whole scene play out. After that Frost desides to follow Leo around, since he found him quite the interesting character. As he does so, he tries not to show himself, but Leo could sense him, so at one point the turtle tells him to stop following him if he doesn't want to get into trouble with him. Frost shows himself to Leo, which kind of catches him off-guard. Not that the turtle hadn't seen giant mutated creatures, fought alien dinosaurs, but this one was somehow able to catch his interest. He had never seen a giant lizard before, it was the closest thing to another reptile that he'd seen.

Frost decides to leave the turtle by himself, going off into the forest. Later on tho, while Leo is taking a break from his venture, he over-hears roars, standing up he looks around trying to spot what's causing that noise. After heading towards the noise, he spots Frost being attacked by a pack of wolves, he decides to help him, drawing the wolves away and hiding with Frost in his hideout. There, the two get to know each other a little better. As there's a big storm outside, and probably a vicious pack of wolves going about, talking to each other was the only thing they could do.

After the two get to know each other, they grow to trust each other a little. After Leo is sent back to NYC, Frost follows him, and later on the two meet again, growing more attached and friendly to one another, later on, becoming partners.

Once back in NYC, sadly Frost does not remember his siblings, as he is the last of them to be found by the turtles, completing their family. It takes him quite a lot of time to remember his siblings and get used to living around them. But soon enough their family grows back to normal.