R4 in Base 327: The New Guy.
R4 is a red Astromech droid from Base 327. He appears is in Base 327: The New Guy, when The Commander says "Oh, hey R4" and then the Excited Clone breaks the wall and it falls on the droid. His only other appearance is a cameo in Christmas at Base 327 4; he is in the line of clones waiting to see Santa.
It is rumored that R4 is a secret member of Red Squadron.He is a main character of base 327.He also appears in captain norric .