Sieg Fate/Apocrypha

Sieg is the main protagonist of Fate/Apocrypha and the Master of Rider of Black during the Great Holy Grail War. He is a homunculus created by Gordes Musik Yggdmillennia as part of the Black Faction's homunculi army, some of which fought on the frontlines and others were used by Caster of Black to power his golems.