Wisdom Kings are the third type of Buddhas behind tathaagatas and bodhisattvas.
And they belong to the third hierarchy of Buddhist Pantheon. Just as the term indicates,The Sanskrit name "vidyarāja" mean knowledgeable and bright. Wisdom Kings The female counterparts of Wisdom Kings are known as Wisdom Queens, although the distinction is often ignored.
Acalanātha (अचलनाथ) is the best known one of the Five Wisdom Kings.
He is the destroyer of delusion and a principal protector of Buddhism.
His immovability refers to that aspect of mind (Buddha Nature) which is forever unmoved - perfectly stable and unchanging.
Despite his fearsome appearance, his role is to aid all beings by showing them the true essence of the teachings of the Buddha, leading them into perfect mental discipline. He usually holds a sword and a lariat, is clad in monastic rags, has one fang pointing up and another pointing down, and a braid on the left side of his head.
Kuṇḍalī (कुंण्डलि) is one of the Five Wisdom Kings. "Kuṇḍalī" is a general term for three Kuṇḍalī kings, and have "Padmakuṇḍalī", "Vajrakuṇḍalī" and "Amṛtakuṇḍalī". The image of Kuṇḍalī Vidyarāja that we take for granted is mix.
Hayagrīva is the Wisdom King that is crowned with a horse-headed corona. "Haya" of hayagrīva means a horse and "grīva" means a head (or swinging shiny mane) in Sanskrit.
Her image that is depicted in the Mahavairocana-sutra is referred to as the aggregate over each and every Divine forces like a demonic forces, but these expression represents the acquirement of pure knowledge = the Divine forces symbolically.
Rāgarāja is counted among the Buddhist Wisdom King in the Buddhist Pantheon. She is known to transform and refine lust of chthonic things into enlightenment (≒best minds).
Exactly she is justly termed the King of Pawn, that is the King of Porn.
Āṭavaka is the king of Wisdom Kings. But what he is been is the supra-dimensional multi-layer bodhi aggregate of all kinds Buddhas. Therefore he is an intangible presence.
Though he was the one of V(Vaiśravaṇa)-8 yaksa generals originally, he evolves toward the Wisdom King with the bodhi of Buddhas through death of his master after the death of Vaiśravaṇa.