B.A.C.K.
From Blaseball Wiki
A Digital Image of a BACK Operative facing away from the viewer, they are a short statured humanoid with swept back horns that curve forward again at the top and a lizard tail, they are dressed in practical robes with oversized sleeves and a patch that reads "BACK" on it's left shoulder, flat bottomed sandals, and what looks like a bookshelf augmented with reading lights and an underslung battery crowded with books. The two visible titles read "A Romance of Bees" and "Grand Un-Slam: Theories and History." They are holding a map in their hands and looking over their left shoulder at the viewer. Art by @wiresandlight
B.A.C.K. stands for Bureau of Archive Collection and Knowledge and is a loosely-connected research organization in the Core.
