R is the personification of the letter "r", and is an important member of ABCDEFGHIJKLMNOPQRSTUVWXYZ. He is known for his roughness, rashness, and recklessness.
R was born with the other letters, but was rather reclusive. R always ran around telling people "Rrr..." They decided he was insane, and locked him up, but when it turned out he wasn't, they took him to The German Prison so he would be.
He went insane, and was let out, so he started ROARING. He then ran when the Police came. R reluctantly ran back to ABCDEFGHIJKLMNOPQRSTUVWXYZ, who accepted him.
R now works with ISN as a member of their "Work Team", which just means the guys that sit around all day in an office and collect paychecks.