Board Thread:Character Discussion/@comment-37637019-20181206203844/@comment-1890776-20190114183322

His initial intent was to join the Imperial Army in hopes of gaining money and sending it back to his village.

If it starts with him finding his friends dead, Tatsumi then killing Aria and Akame just leaving him because he wasn't a target, then I could imagine him trying to be a wandering mercernary of sorts. It was at that point he realized just how corrupt the city/government was. I can't really imagine him joining the Jaegers after that.