Optimus Prime

Early Life
Orion Pax was a young bot who worked as a police officer in Iacon. He and his partner, Prowl worked together to bring criminals to justice. At the same time, Orion worked at History of Iacon which was a library about the past of the Cybertronians. There, Orion was taught by Alpha Trion.

As time went on, Orion decided to join the Elite Guard Acadamy. He was a great student and soon befriended his teacher and later mentor, Megatronus. When Orion graduated, Megatronus took Orion in and worked with him.

Politics
Megatronus soon decided to be a politician. Orion suggested he should change his name as Megatronus was the name of The Fallen. Megatronus did what Orion said and changed his name to Megatron. The two met new people who joined their cause. One of them was Shockwave.

Orion kept fighting with the Elite Guard and worked with Elita One and Magnum. The three became close friends and Orion spent time with them when he wasn't on missions or with Megatron. The Elite Guard was later sent to a mining facility that was having a riot. Megatron met his old friend Soundwave who was one of the miners. Because of this, Megatron and Orion fought with the miners instead of against them. This spread a rumor about a rebel alliance.

Decepticons
Megatron soon saw that fighting as a politician didn't work. He instead made attacks on Iacon, but wouldn't hurt anyone but soldiers who were trying to stop them. But this soon changed. Thirty innocent were killed which made Orion thinking about leaving the rebel alliance now known as Decepticons.

He returned to Alpha Trion and worked there. Elita One also got there and met Orion again. But as they did, Megatron got to there and demanded to get the Energon stored in the library. Orion tried to stop Megatron, but Megatron shot at Orion with the idea not to wound him too much. But Orion jumped to the side and the blast hit the Energon and it exploded nearly killing Orion. Elita One then helped Orion to Alpha Trion who rebuilt Orion to Optimus.

Autobots
After this, Optimus became a squad leader in the Autobot army. He fought side by side with many soldiers. One of them being Sentinel Minor. Sentinel tried to save Elita One at one mission, but Optimus stopped it as it was against their orders. This caused a fade between both Optimus and Sentinel and between Optimus and Magnus. This later ended when all of them becoming friends again.

Sentinel even made Optimus into his pupil after Zeta Prime died. Years went by as Optimus was seen as a hero. It took until after Sentinel died, Optimus got the Matrix of Leadership. This made Optimus into the first and real Prime since the first thirteen. He led the whole Autobot army after this.

But after years of war, Optimus decided to get away from Cybertron. They used the Ark to do this, but Megatron followed in his own ship. It ended with both leaving Cybertron and getting to another planet far away.