Ksitigarbha
Ksitigarbha is one of 4 chief bodhisattvas in Buddhism. The other three are Samantabhadra¡BManjusri and Avalokitesvara. It's said that Ksitigarbha was assigned by Gautama Buddha to watch over the living beings after the fall of Gautama Buddha and before the rise of Maitreya Buddha. He also vowed to rescue all miserable souls in hell before he could achieve Buddhahood. Therefore in East Asia, Ksitigarbha was reverenced as guardian of the deceased. In Qing An temple, you can see the statue Ksitigarbha was riding on a mythological creature named as "DiTing" (literally translated as "Listening"). It's said that creature DiTing could hear any tiny voice or whisper from any living beings in this universe, then tell who or which was good or evil.
Avalokitasvara
Mian Ran
Rulers of ten purgatory courts
In Taiwanese folk religion, hell is a purgatory place governed by ten respective rulers (similar as Yama). Each ruler managed a court (from first to tenth) which imposes judgment and punishment to the deceased who committed different sins (or karma) in pre-existence, for example, such as adultery¡Bgluttony¡Bindolence¡Bbetrayal¡Bmurder ¡K etc. After the deceased done with their punishment, they would be sent to tenth court to transmigrate to next life.