Which being flew to Isaiah with a live coal from the altar?

The being that flew to Isaiah with a live coal from the altar is identified as a Seraphim. This is supported by the account found in Isaiah 6:6-7, where the Seraphim, described as heavenly beings, are in the presence of God and perform the task of purification. In this vision, one of the Seraphim is depicted as flying to Isaiah with a burning coal from the altar to touch his lips, symbolizing the cleansing of his sin and preparation for his prophetic ministry.

This act signifies the Seraphim's role in the divine presence and their function in carrying out God's purification process. While angels, archangels, and cherubim are also important figures in biblical texts, the specific characteristics and actions of the Seraphim in Isaiah's vision uniquely identify them as the being responsible for this significant act of purification.