@@Professor Annabella,
Thanks for the compliment on my OC, I have not seen Full Metal Alchemist but I have heard a lot of people singing its praises.
--- OC story ---
Prior to the war, Melke had been studying alchemy from Zecora in the EverFree Forest and he has seemingly inherited her skill in alchemy. Through his advancement in his skill, he is able to temporarily use some of his original powers he had back in his home world.
When the war started, Zecora had left her home to support Equestria but Melke said behind in the EverFree Forest and took a neutral stand to the war and helped only the wounded that he came across while looking and stockpiling alchemy ingredients. He did not care much about the conflict as, to him, it was not a war that he should take part in. However, that changed when the machines were introduced to the war, Melke started facing problems in taking the neutral stand.
The Buggers attacked him and wounded Melke very badly, forcing him above ground where Melke encountered his first Enforcer. Melke got shot and also smacked around badly, and he was forced to use his magic against the robots. He implanted a powerful spirit into a nearby tree and that distracted the enforcer while Melke made a run for it.
After many days of more close calls and injuries, surviving thanks to his stock of brews and savaging weaponry from junk and also using his senses, Melke got a visit from Syo. She wanted to bring Melke out of the Equestria Dimension after finding out what had happened but Melke had seen enough to know that he cannot run from this fight as he owed these ponies for his better life. But Melke knew that he have to get better weaponry and he knows that Syo could do something about it. Syo left for a moment but Melke had to seek shelter as he encountered his first Hawk.
Melke was close to death when Syo came back with his weapon. Syo teleported the Hawk away but it was a bad move as now the robots know about them. Syo made her exchange quick with Melke as it would not be long until more robots show up. She handed him a shield and then opened him a portal to a safer place. Syo wished him luck before leaving as well, back to her home world.
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I hope that is okay. Syo is a dimension jumper and the one who brought Melke to Equestria in the first place. The shield is a mystical weapon that requires magic to function and it can transform into a bow for offense. The portal Melke entered can bring him to the rp location as its destination is random.