Symbol/Character Guide
兄弟: brothers. Mostly refers to Ed and Al, though also used to talk about 48/Slicer brothers from Lab 5
同じ: same. Means that the stuff that happens in Brotherhoos is the same as the manga.
BH = Brotherhood
兄 = older brother, refers to Slicer brother
弟 = younger brother, used refers to Slicer brother
一は全、全は一 = All is one, one is all
兄弟の父 = the brother's dad, refers to Hohenheim