Seraphim:

A word that comes from the Hebrew root Saraph meaning “to burn.” Seraphim literally means “the burning ones.”

In particular, the word “seraph” means “fiery angel” or “burning angel”, referring to the burning up of self-awareness that accompanies deep intellectual comprehension of divine reality.

The seraphim are the more “intellectual” angels, who personify divine consciousness based on intellectual comprehension of divinity. They include Michael and Gabriel.