Bittergiggle, also known as The Jester, is the main antagonist in Garten of Banban 4.

Bittergiggle appears to be a humanoid split into two parts, with left side being frowning corrugated and purple apart form the area around the eyes and foot which are green. The right side is smiling, smooth and green aside from the eye and foot which are both purple.

His goal is to make Queen Bouncelia laugh, unleashing The Naughty Ones, plunging the current level in ruin.