Seraphim are the predecessors of the modern Agents in the current Matrix, They were used in the Matrix betas. They have the general appearance of agents with square glasses, but have wings. Seraph is rumored to have been formerly a Seraphim – especially when it's pointed out how he looks without wings. Belial was believed to be a Seraphim. Baelroth was a fallen angel exile, presuming that he was once a former seraphim.