Rottweil Berzinsky, also known Silver Lizard, is the Master of Archer of Red of the Red Faction in the Great Holy Grail War of Fate/Apocrypha.

Rottweil is a freelance magus. Just like the other Red Masters such as Jean Rum and the Pentel brothers, he has fought both together and against Kairi Sisigou at various times in the past.

He once participated in a subspecies Holy Grail War that has a maximum of five servants. The organizer declared that this subspecies Holy Grail War objective was to gather Magical Energy. His client hired him to take part in the summoning ritual and killing their respective servant. Rottweil was irritated by this task, to which he reacts by killing his client and the other participants. However the gathered Magical Energy ran wild and caused a large explosion which he barely survived. He had to shed his skin twice to recover.

Apart from his face, most of his body is covered in silver scales. It seems that he also has the organs of a lizard as well.