as a young child Ragna was a Labrat along side his younger siblings Jin and Saya however one day Jūbei (one of the Six Heroes) freed from the lab. they were taken in church & was watch over by celica A. Mercury. at some point Saya begin to get ill ragna decide to look after her. But on day changed everything for Ragna the church was burning ragna was stab int chest & his right arm was cut off all thank to yuki terumi & his brother Jin. ragna was later vistied by Rachel Alucard she bitten him save his life & somehow found the Azure grimoire (looked I'm just confused). Ragna was later found by jubei & he begin to train Ragna how to use the Azure after complete his training jubei give ragna a red jacket, a weapon called Blood Scythe & the name Ragna The Bloodedge. he later become a wanted criminal in the BlazBlue universe for destroy city & it cauldron.

the voice I'm looking for is the same as his english voice actor this video will help you: https://www.youtube.com/watch?v=3u6KFKI8zXA&t=

*Note that anyone who get's Ragna will get  some line right away for first & english dub trailer*