Indigo appears as a giant, dark purple-colored, round-bodied astronaut figure with a gas tank behind the back of their suit, accompanied by a visor on their head that changes shape to express emotions in the series. Indigo, similar to the others, have short legs and floating hands.

Indigo is known for being the biggest and tallest character than all of the other characters that have been seen so far (excluding the background characters), being three times bigger than the average Crewmate and Im