The version of [[merlin (fate)|Merlin]] from the universe of [i][[Fate/Prototype]][/i]. According to this universe's [[arthur pendragon (fate)|Saber]], this Merlin is actually female. 

She makes a vocal cameo in [i][[Fate/Grand Order]][/i] when Prototype Arthur uses his Noble Phantasm. Amusingly she is voiced by [[Kawasumi Ayako]], who voices Artoria (and her variants). 

She later made her first playable debut in [i][[Fate/Grand Order Arcade]][/i] in September 2020, establishing an official design.

In summer 2022, Prototype Merlin became a summonable [[lady avalon (fate)|Pretender-class Swimsuit Servant]] in [i]Fate/Grand Order[/i] itself, going under the alias [b]Lady Avalon[/b].

h4.Ascensions ([i][[Fate/Grand Order Arcade]][/i])

* [[merlin_(fate/prototype)_(first_ascension)|First Ascension]]
* [[merlin_(fate/prototype)_(second_ascension)|Second Ascension]]
* [[merlin_(fate/prototype)_(third_ascension)|Third Ascension]]
旧マーリン プロトマーリン