D is the fourth letter in the Alphablocks gang. He is B's older brother and plays the drums.
He is a perfect purple cube with a light green star on his left eye. His eyes nearly always look angry every time he appears.
D is dark blue and his star is a darker blue. He wears sunglasses.
- "Don't despair."
- (to his sister B) "Dynamite, sister."
- D's letter means:
- 500 in Roman Numerals.
- 13 in Hexadecimal.
- Animal (The Muppets) - Both are drummers.