Queen Britannia

The Queen Britannia (クイーンブリタニア号) was a luxury cruise ship and floating fortress, formerly used by the British Royal Family.

Appearance
The Queen Britannia was a grey ship about 200 meters long and 3 stories high (about 9 meters from waterline to the deck), looking like a combination of a luxury cruise ship and a warship. Much of the interior was described as being more like that of a palace or museum than a ship, with many antiques, works of art and high-class décor. The decagonal heliport which acted as the central temple was located at the aft of the vessel.

Heliport Temple
The core of the Queen Britannia was the ship's central temple, based in the heliport on the aft deck. Lacking the standard markings of a typical helipad (such as the large 'H'), it was an open decagonal pad with many grooves and patterns carved into its floor. The temple's ten sides symbolized the ten sephirah of the Sephiroth.

The temple had the effect of amplifying all magic and spiritual items used within it.

In order to aid the temple's users in carrying out ceremonies, there were a number of meter-wide floating plates which could carry magical tools over from the edge, in response to vocal instructions and gestures. Equipment carried on the plates included:
 * A ceremonial sword without a blade and a metal plate with powder for a camphor flame, used for banishing rituals.
 * A few crystal balls and fire-based light sources, as well as a glass panel, functioning together as a projector.

Being the most important part of the ship, the temple was protected by a thick and powerful barrier. Once activated, the barrier would let things out but not let anything in - with access to the temple only possible through the ship itself, following the correct procedure. The barrier blocked practically nearly all outside interference and was resistant to most levels of brute force, capable of withstanding attacks from nuclear weapons and the likes of the Curtana. Rather than being a wall dividing worlds, it was said to be more of a constructed world placed in-between as a cushion, and as such one would require an attack capable of destroying a world, or Imagine Breaker, to break through it.

The temple was also capable of launching attacks to intercept enemies approaching the ship. Aside from its generic settings, it could also weaponize any magical tools connected to the altar (which would already be amplified by its effects) - according to the Knight Leader, even something like a four-leaf clover or a rabbit's foot would produce a barrier that would distort luck so approaching ships and aircraft would sink. With the Honours of Scotland and the Stone of Scone, it was capable of unleashing a powerful barrage with 400,000 shots (100,000 of four different varieties) per volley.

Background
The Queen Britannia served and protected the British Royal Family for many years, and the princesses have numerous childhood memories from their time on the ship (including wrestling in the large beds, sneaking into the kitchen to swipe food, and in Carissa's case, secretly handling an expensive violin as a pretend sword).

After being decommissioned, the ship was moored in a harbour in Edinburgh as one of its major tourist attractions. As forcefully dismantling the ship might have resulted in a rebound which could have blown away half the country, it was instead intended that the mental noise from the thoughts of the many ignorant tourists would gradually neutralize the magical symbols over time, though it was estimated that the process would take over 1200 years.

Coronzon Arc
At some point prior to the events at Edinburgh Castle, Coronzon (in her guise as Archbishop Lola Stuart) had made arrangements for the Queen Britannia to be moved from its mooring in Edinburgh. When the ship arrived at, Coronzon hijacked the ship, swiftly removing the people onboard, who didn't know how to activate the ship's defenses, within 30 seconds. Turning on the magical defenses, which soon shot down several Anaconda cruise missiles fired at it at around 10 AM, Coronzon accessed the central temple and prepared it for use together with the stolen Honours of Scotland and Stone of Scone in the Ceremony of Mo Athair.

While the Queen Britannia was passing south of the at 11 AM, heading for the optimum point for ceremony and due to arrive at noon, the British forces froze the surface of the  in order to slow it slightly and to provide a foothold for them to attack the ship. In the battle, the Scottish royal treasures were used in conjunction with the ship's temple to fire a barrage of 400,000 shots per volley against the attackers. At the end of the battle, the ship was bisected from within by a beam unleashed by the entity within Kamijou Touma, which emerged after Imagine Breaker was severed. It subsequently sank in the half hour following noon. As the ship had many antiques and works of art onboard, it was expected that professional divers would soon search the wreck on the sea floor.