Deathcrown was the last member to join the Quinque Dracos.
His task during the seal ritual against Ragnarok was to keep him at bay.
Between Life and Death summons a different Dragon than the Dragon from his human form. It is the same Dragon from the Deus Deathcrown Raid and considered Deathcrowns true, dragon form. He is capeable of transforming into that form at will.
His weapon changed from a classic European long sword to a form of Japanese sword - Daito.
Both his Dragons, from human and Draco form, can be raided in chapter 1.
His shield is called Death Head. A barrier in front of the shield will be visible when hit.