Note: The following is a fanfiction and such a character does not exist in any media. It is my personal attempt to cross-over Toaru and Fate that resulted in me making the unknown Lvl. 5 esper a teleporter and putting him in the Holy Grail War as a Caster.
"The amount of information in this mind is something you can't fathom. The knowledge of 11 dimensions is immense and I don't expect battle crazed brutes like you to understand the intricacies of Space-Time manipulation." - Caster to every other Servant
Class: Caster
Other classes: Assassin
True Name: Unknown(Referred to as No. 6 by his supervisors)
Alignment: Lawful neutral
Place of Origin: Presumably India
Parameters:
Strength:E
Endurance: C
Agility:E
Mana:A+
Luck:C
Noble Phantasm: A++
Height: 178 cm
Weight: 75 kg
Likes: Complex calculations, mathematics, intelligent company, chocolate
Dislikes: Muscleheads, Kiharas, Aleister Crowley, spicy food, loud music, getting his concentration disrupted
Talent: All forms of mathematics and calculations, photographic memory, can fly via applied teleportation
Natural enemy: Berserkers(because they are noisy, muscleheads whose loud screaming always disrupts his concentration), Kihara family, Aleister Crowley
Attribute: Space
Traits: Extraordinary mathematical genius, Level 5 Esper, Toaru Raildex character(fanfic)
Armament: A self made gauntlet which uses brainwaves and thoughts to create portals and to provide defense or offense options via portal creation
Catalyst: A treatise on teleportation written by him
Class Skills:
Item creation:
Rank C
Caster can create gauntlets which help to create portals quickly. He can do so without gauntlets but they provide him with a 0.005 second cast time compared to 0.05 without the gauntlets. He doesn't know to make anything else. The durability of the Gauntlets is decent and requires an attack above C rank to damage it. Making a new set of gauntlets requires 1 day.
Territory Creation:
Rank A-
Caster can create invisible cubic teleport barriers that teleport anything that touches it in its boundaries to its centre, thus trapping him/her/it. The effect of this barrier can manifest both from inner boundary of the barrier as well as the outer side. Trying to escape and touching the inner barrier wall will teleport the traped being back to the centre and touching the outer wall by mistake will also have the same effect. Servants with magic resistance of B+ and above can resist it but will be immobilised for 1 minute. Characters with magic resistance of A+ or above won't be affected at all.
Personal Skills:
Teleportation(Partial and Full)(Contact-based)
Rank: B+
An ability to teleport any object or part of it. Has various applications, but he mainly uses it to teleport large and heavy objects above enemies and try to crush them. Has a limit of 1 ton carry weight at any given period of time. Rises to 1,000 tons during during Lvl. 6 shift. Servants with magic resistance of D to C will get instantly decapitated, ignoring durability, or get teleported/BFRed . Decapitation occurs by teleporting limbs, heads etc. of servants from their bodies to other locations. Servants with magic resistance of above C and sufficient Strength stat can resist this. Insufficient strength of below B will still result in decapitation except it will not be painless this time. Exceeding the weight limit will damage him, with greater weight causing more damage. Can also teleport himself to dodge or travel long distances or to travel between the 11 dimensions. Range of teleportation is 1 light year in 3D world(can teleport you to outer space and can strand between dimensions 4 to 11 if need be, although dimension BFR will become unavailable for a week after use. If stranded between dimensions, the only way to get the servant back to the real world is to use command seals.
Teleport Shield-Passive(Contact-based)
Rank:A+
An applied skill created using the teleport and territory creation skills. All attacks and magic attacks that come in contact with Caster's body will instantly get teleported elsewhere. Magical attacks or Noble Phantasms of above A+ rank can bust through this shield, but all others get redirected. Default setting of the redirect is set at 50 cm behind the source of attack(Eg. If you shoot him while he is unaware, the bullet will teleport 50 cm behind you and hit you in the back. If Caster is aware of the attack, he may redirect it back at the opponent from a different direction. If it is a melee attack and he is aware of the attack, he can chain the shield with teleport skill to decapitate at the moment of contact. The shield provides defense against 1 hour of continuous attacking(a constant stream of attacks without even a moment of delay between 1 attack and the next, 1 sword swing thus should take less than a second of time off of the shield). A depleted shield takes 1 full day to recharge completely.
Portal Creation - Short-Ranged
Rank:B
Caster can create stationary portals in order to connect two places. This can be used for travelling distances and uses less mana than teleportation. This can also be used as a defensive technique as even EX ranked projectile attacks will go into the portal and get redirected elsewhere. If its used to stop a charging servant and the servant has low magic resistance and/or low strength of below B, the body parts not encompassed within the portal boundaries will get decapitated and the portion that goes into the portal will be redirected while the rest of the body will stay where the decapitation occurred. Servants with higher resistances and strength will collide, trip etc. at the boundary of the portal. Portals are easily visible even for normal humans.
Noble Phantasm:
Level 6 Shift - Passive
Type: Support, Augmentation
Rank:A++
Range: None
Max Targets:1(Caster himself)
If Caster manages to kill 2 Servants, this Noble Phantasm automatically activates. This raises the rank of all his skills by 1 and gives each skill some new attributes. The teleportation skill no longer requires contact and Caster can decapitate Servants remotely, provided he knows exactly where the Servant is. The teleport shield becomes mobile and movable. He can increase the size of the shield to provide extra protection to nearby allies or to give them a teleport shield of their own. The teleport shield given to allies protects for 10 minutes worth of attacks and his personal shield's protection time gets increased by 10 minutes due to the Phantasm. The portals are also movable and he can move them around at high speeds. The edge of the portal acts like a blade and can decapitate opponents. In this state, he can use dimension BFR twice. Recharge times remain the same as before. Magic resistance and Strength requirements to resist these skills also increase by 1. Caster while in Level 6 Shift mode will be mindless and a little Berserker-like, attacking everything in sight. The master can use command seals to bring him back to his senses. If this is done, he can unlock Level 6 Shift mode at will, but will always require command seals to get his wits back.
Lore(Fanfic)
Kidnapped at a young age for his intellectual talents by the Kihara family, Caster's early life consisted of him being constantly experimented upon in order to develop his latent Esper skill. The skill turned out to be teleportation and he started getting groomed to be the successor of Awaki as it was suspected that she would betray the City Board of Directors/Kihara family/Aleister someday. He eventually far surpassed her and this led to the Kiharas grooming his talents in a different direction. He was forced to travel the dimensions constantly, coming back to the real world only for food and water which would be given at fixed times only. He spent 15 years travelling to and fro between dimensions in this way, eventually memorising every coordinate, but forgetting his own name in the process. Communication with his superiors was through machine only and he gradually started losing his emotions, speaking in robotic tones but always craving someone to talk to in the wilderness that is the 11 dimensions. Eventually, he found himself in one of Othinus' created worlds and met Kamijou Touma. Overjoyed that he had someone to talk to, he would make the journey to that dimension and meet him daily, while keeping it a secret from his superiors. Using his dimension BFR, he would teleport Touma to a different place and talk to him about the outside world and his situation. Burning with a desire to break free, he used his skills to wreck havoc on the Kiharas and their facilities, eventually sending each to a different part of different dimensions ensuring that they would never be able to meet another soul anywhere and doomed them to life in the dimensions they wished to learn so much about. Ridding the world of the Kiharas ensured that the people of Academy City were freed from their cluches and he was hailed as a hero. When he died, his soul was taken by the Grail in order to use as a Heroic Spirit. As for Touma, Othinus eventually gave up trying to break him and they were able to meet in the 3D world, swapping the tales of their adventures.
Personality
Calm and composed at all times, Caster tries to keep a cool head always. He isn't prone to anger, nor jealousy or most other negative emotions. At worst, he gets annoyed by the things he hates. The reason for his composure is the complex calculations he's always doing in order to use his skills. If his mental state becomes ruffled, he may become unable to calculate, or make mistakes in them. Mistakes in calculations may mean a botched teleportation, so he always avoids distracting situations whenever possible. He craves intelligent company to speak with and enjoys social interaction in general as it one of the things he's bad at. His ultimate wish is to regain his lost emotions and became capable of holding a normal conversation. If the master uses Command Seals to get him out of Level 6 Shift, he becomes grateful as he considers a state of mindlessness distasteful. Has no problem with getting into that state, just abhors staying like that for extended periods of time.
Relationships
Kamijou Touma is a great friend.
Note
Is this too broken? I gave him quite a few limits but he may still be extremely broken.