Daybit Sem Void

One of the seven Crypters, Masters attempting to supplant the Greater History of Man with that of the Lostbelt. He was formerly one of 48 Chaldea Master Candidates and a member of A-Team.

He was supposed to summon a Berserker-class servant; it has been confirmed that Daybit has summoned a Grand servant.

(Source: TYPE-MOON Wiki)