Yun Bayin is one of the 37 nats

Nat (spirit)

The nats are spirits worshipped in Burma in conjunction with Buddhism. They are divided between the 37 Great Nats and all the rest . Almost all of the 37 Great Nats were human beings who met violent deaths . They may thus also be called nat sein...

 in the official pantheon of Burmese nats. He was Mekuti, the captive king of Lanna Kingdom, who died of illness during the reign of King Bayinnaung

Bayinnaung

Bayinnaung Kyawhtin Nawrahta was the third king of the Toungoo dynasty of Burma . During his 30-year reign, which has been called the "greatest explosion of human energy ever seen in Burma", Bayinnaung assembled the largest empire in the history of Southeast Asia, which included much of modern day...

 of Toungoo

Toungoo Dynasty

The Toungoo Dynasty was the ruling dynasty of Burma from the mid-16th century to 1752. Its early kings Tabinshwehti and Bayinnaung succeeded in reunifying the Pagan Empire for the first time since 1287, and in incorporating the Shan States for the first time...

(1551–1581). He is portrayed sitting with right knee raised, right hand holding a sheathed sword across the shoulder, and left hand on left knee.