Mashu Kyrielight

Mashu Kyrielite, also known as Shielder is the first servant available to the Master and the only Shielder in the entire Fate franchise.

Mashu is the only servant to have 0 cost. She's also unique in the sense that it is not possible to manually ascend or upgrade her Noble Phantasm, as her max level is locked by the Main Quest's progression. Shielder's first ascension happens at the end of Rome.

She is also the only servant who is not weak against Berserkers, but they are not weak against her either. This makes her a very solid defensive unit.

Active Skills
Transient Wall of Snowflakes=

Obscurant Wall of Chalk=

Battle Continuation C=

Biography
Height/Weight: 158cm ・ 46kg

Source: Fate/Grand Order

Country of Origin: Chaldea

Alignment: Lawful ・ Good

Gender: Female

The figure of Mashu Kyrielight, a Chaldea clerk, who underwent a possession union with a Servant. This is called a Demi-Servant.

Mashu has obtained the True Name of the Heroic Spirit possessing her.

The name of that knight is Galahad.

One of the Knights of the Round Table from Arthurian Legends.

The saint who was the only one to obtain the Holy Grail, just to return it to heavens.

Chaldea had success in summoning Heroic Spirits with its own original method, but what lies at its foundation is the "place where heroes assemble" - the shield held by Mashu, which made use of the Round Table and became the catalyst for summoning Galahad.

Trivia

 * It is impossible to get rid of Shielder. She cannot be burned or used as experience for other servants.
 * Shielder can only get experience bonus from an exp card through the use of an all-classes card.
 * Shielder doesn't deal any extra damage to any other classes nor any of them can to her.