The immovable Bodhisattva is known as Acalanatha, which means "immovable" or "unshakable one". In Vajrayana Buddhism, he is referred to as the "Immovable King" and is considered the foremost of the Eight Great Vidyarajas (Wisdom Kings). He is believed to have the power to eliminate all obstacles without wavering.

The central figure of the Thangka is adorned with a five-leafed crown, fiery hair, three round and piercing eyes, wide-mouthed with a lion's nose, and possesses an extremely fierce appearance. With dangling earrings, one hand grasps a Vajra noose in front of the chest, while the other hand raises a Wisdom Dragon Sword, the naked body draped in a tiger skin skirt. The right leg is bent, while the left knee rests on the ground, kneeling on a lotus throne. Flames symbolizing boundless wrath emanate behind the central figure. Above the central figure are five radiant suns, representing the hand gestures of the Three Buddhas, with two stupas depicted within. Below the central figure are the four Dharma Protectors.

The overall composition of the Thangka is meticulous, with vibrant colors, and holds significant artistic and religious value.