He is one of the angels of secretarial section who serve "Tsukuyomi", the Director of "Oracle Think Tank". These angels work as servants of their "princess", Tsukuyomi, and work to manage her schedule, protect her as her bodyguards, and look after her daily life. They work so "perfectly" that without them, the business of Tsukuyomi---and also the business of the whole Oracle Think Tank, would be hampered.
Those who have meetings about great deals with Oracle Think Tank are served by them "perfectly". They are guided and flown to the uppermost floor of the building in the butler angels' hands. Awaiting them is the top-level tea on the table, and the top-level severe talk.