Biblical: Sandalphon is named after an Angel that was known for being one of the tallest in heaven. He is also a master of heavenly song. Sandalphon is also known as the "angel of tears." He was said to be central to the process of differentiating a human embryo before birth.
Evangelion: When NERV locates Sandalphon in the series, he is at the heart of a volcano. He is in an embryotic state, and they decide to take the opportunity to try and capture him before he hatches. Asuka tries to cage the egg, but Sandalphon awakes and begins darting around, battering the Eva. They kill it from the inside out because its skin is so tolerant to the heat and cannot be pierced.