アーサー・オルタ
Saber-type Servant that was first mentioned in an art book containing promotional material for [i][[Fate/Prototype]][/i]. He is the Alter version of the Prototype universe's [[Arthur Pendragon (Fate)|Arthur Pendragon]].

Notably, Arthur Alter's [[Excalibur (Fate/Prototype)|Excalibur]] is said to be untarnished, unlike [[Saber Alter]]'s [[Excalibur Morgan (fate)|]]. Despite this, fandom interpretation of Arthur Alter often has him use a corrupted Excalibur similar to Saber Alter's own. 

Visually, he shares Saber Alter's [[yellow eyes]] and [[platinum blonde hair]], and wears [[black armor|black]] [[armor]].
arthur pendragon alter (fate)