For 3★, see Cú Chulainn (Caster). It was arranged so that he would proceed to a mystic region called the Land of Shadows as a condition for marrying a certain woman. Cú Chulainn overcame many obstacles to reach the Land of Shadows. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article. As an adult, Cú Chulainn entered the "Red Branch Knights" who protected the King of Ulster. The matured Cú Chulainn enrolled into the "Knights of the Red Branch" that protected the king of Ulster. From a reliable Lancer in the early game, Cu turns into a solo/last stand specialist that can grasp victory from the jaws of defeat, a role in which he truly excels.

Trivia He has the highest ATK values out of all Berserkers., He has the 3rd highest ATK values out of all servants. Cú Chulainn overcame many obstacles and reached the Land of Shadows. While Cu Chulainn’s limitations mean that he is far from a perfect answer to everything, it is his high survivability, and low investment cost that any new Master can appreciate. There the lord of the land, the witch Scáthach, took a fancy to him. This article is for Cú Chulainn (Alter). This is a disambiguation page for Cú Chulainn: a list of similarly named articles. For 3★, see Cú Chulainn& Cú Chulainn (Prototype).

In order for him to marry the woman he loved, he was tasked to enter a place called the Land of Shadows.