It is her most popular nickname.

What is he class as a Servant?

She may have ruled her people, but she never LED them.

It was Quantum Time Locked to fall in order for Humanity to progress.

Lancelot committed adultery with Queen Guinevere. 

King Arthur did not understand the hearts of men.

King Uther Pendragon, her biological father.

King Vortigern Pendragn, her paternal uncle.

Merlin, the half-Incubus known as the Magus of Flowers.

Because she never pulled Caliburn from the Stone to prove her worth.

None of the above--she has never once despised Mordred.

Caliburn: Golden Sword of Assured Victory

Excalibur Morgan: Sword of Promised Victory

Excalibur Vivian: Sword of Sunlight Glittering Victory

Rhongomyniad: The Light That Shines to the Ends of the World

Yes, what knight of the Round Table CAN'T swim!?

No, her blessing from Vivian, the Lady of the Lake allows her to walk on it

Shirou Emiya is far from an ideal Master.

How well do you know Arturia Pendragon a.k.a. Saber from the Nasuverse?