Geralt of Rivia

Geralt of Rivia is a legendary witcher from the School of the Wolf, active throughout the 13th Century. Adopted father of Ciri, and lover of Yennefer, Geralt played a hand in events across the Continent that would change history forever.

Winter At Kaer Morhen
Geralt began his journey throughout the multiverse rather simply. It was the winter of 1275, and Geralt, out of habit, had decided to return to Kaer Morhen more than two years after the defeat of the Wild Hunt and Vesemir's death. But with the abandoned Kaer Morhen, the beasts that once roamed the Kaer Morhen valley were plentiful once more.

A Ball And Magic
One beast, however, was strange. Geralt encountered the small ball only known as the Beheaded once he'd arrived at Kaer Morhen. The Witcher wasn't an easy man to shock, but the appearance of an entirely new monster baffled him. Despite this, the beast caused no harm, and he caused no harm to it.

Eventually, Ciri returned. Geralt hadn't seen his adopted daughter in months, with life on the path a busy one for a Witcheress. Geralt introduced the Beheaded to Cirilla, and inquired if she had any knowledge on what this thing was. Perhaps something native to the valley the Witchers drove out centuries ago, when Kaer Morhen was first constructed. While Ciri looked into it, Geralt took his leave for some time to himself.

The Wyvern
Geralt had encountered a Wyvern when he was first arriving at Kaer Morhen. While he wasn't surprise, it was something better dealt with rather than left to only get worse. Geralt left the keep into the valley, taking his mind off it all while he hunted the Wyvern. Obviously, it was an easy job for a seasoned witcher like Geralt. Geralt didn't decide to stay, either, and once he collected the trophy from the beast, he decided to travel to Ard Carraigh for a reward. If Ciri could find anything on the Beheaded, she'd find him.

The Doctor Of Ard Carraigh
With Geralt's arrival at Ard Carraigh, it was already spring again. The mountain pass as insufferable during the winter, and the journey from Kaer Morhen to Ard Carraigh already took weeks in perfect weather. When Geralt arrived at the Kaedweni city, he pawned the Wyvern's head off for a hefty price.

When he began to leave, however, a man in a strange accent, although with a Skelligan accent, approached him. The seemingly deranged man demanded answers as to why it was snowing. Geralt had no answers for the man, although spotted him leaving towards a strange blue box. Geralt decided to follow the man, and entered the TARDIS.

Adventures Of The Multiverse
Geralt questioned the man inside the TARDIS, and the Doctor informed him of Ragnarok, the end of all things. While the two spoke on the events and the repercussions throughout the entire multiverse, a group of bandits broke into the TARDIS. Told not to kill them, Geralt cast the sign Aard, and dispatched the bandits quickly. Unfortunately, it triggered the Hostile Action Displacement system, and the duo were thrown into the multiverse.

The two traveled the multiverse for a time, with Geralt travelling to the Hubspace's mountains before arguing with the Doctor over some equipment he'd given Geralt. In another point in time sometime afterwards, the two arrived in Victorian London, and eventually helped an assassin known as Jacob Frye end the Autumn of Terror caused by the ex-assassin Jack the Ripper.

Travels Through Tamriel
Sometime during their multiverse escapades, Geralt and the Doctor encountered a damaged Quinjet in space, where the Doctor used his innate skills to repair the TARDIS and return Geralt home. However, the TARDIS was caught in a temporal anomaly, and the two arrived in Tamriel instead. There, Geralt and the Doctor met a Twi'lek engineer named Koyi. The three begrudgingly agreed to work together and close the Oblivion gates, which Geralt speculated was the anomaly they caught prior.

Returning Home
Afterwards, the time had finally come for Geralt to return home. The TARDIS was operational, and the Doctor was tired of him. The two traveled the multiverse and returned to the Witcher's home, but it was destroyed. Upon travelling back in time, they witnessed the destruction of Geralt's universe via Knull's attack on the multiverse. Geralt and the Doctor traveled the Hubspace in search of answers from the strange destruction.

Personality
Typically, Geralt comes off as apathetic, cynical, and threatening. Despite his outwardly cold nature, Dandelion noted that behind his exterior was hiding a fiercely loyal friend, and a man of good humor and as someone not indifferent to suffering. Geralt isn't very talkative, preferring the peace of being alone and simply speaking to his horse.

The Twelfth Doctor
Geralt of Rivia has a tense relationship with the 12th Doctor. He's the Doctor's companion, although a different relationship than a majority of the Doctor's previous companions. Geralt is much rougher around the edges compared to the others the Doctor meets, although it seems fate has knotted Geralt and the Doctor at the hip to spite them.

Powers

 * Witcher Physiology: The first of the Witcher Trials was the Trial of the Grasses, in which it’s said only three (at best four) out of ten Witchers-to-be usually survive. Geralt showed a unique tolerance for the mutagens delivered during the trials, which led to Geralt being subjected to further trials.
 * Witcher Senses: The Trial of the Grasses give Witchers cat-like eyes. This includes their functions. Geralt has been shown to see exceptionally well at night, along with being able to detect tracks long covered up. His tracking skills are amplified with his senses.
 * Lightning-Quick Reflexes: Because of the trials, Geralt now has exceptionally quick reflexes. Geralt has deflected a crossbow bolt with his sword in a matter of seconds before. To become a Witcher without the mutagens is dangerous. Without them, you lack the reflexes required to fight monsters with the same efficiency or skill as a Witcher that’s taken the trials.
 * Slower Aging: Vesemir, Geralt’s teacher, is said to be hundreds of years old. Despite this, Vesemir retains the look of a man in his mid-fifties, with the agility of  a man decades younger than his physical appearance. This is mirrored with Geralt, who is already a century old.
 * Boosted Immune System: Potions in the Witcher world are inherently poisonous. The mutagens given to Geralt and other Witchers create a resistance to these potions, though they must be careful with consumption after a time. This also assists in disease immunity, with Geralt being able to travel through the slums of Vizima safely.
 * Accelerated Healing: When Geralt was hired to cure Adda the White from her ailment as a striga, the monster slashed deep cuts in Geralt's neck with her talons. He passed out, but was aided by Velerad when morning came. He healed soon after, much quicker than a typical human.
 * Magically Adept: While not as skilled in magic compared to a Warlock or Sorceress, Witchers retain some magical abilities, containing the ability to cast ‘signs’. Witchers have been shown to have a sixth sense, so they can ‘feel’ things around them. It further assists their tracking abilities.
 * Aard: Aard is one of the signs at a Witcher’s disposal. It casts a telekinetic thrust at enemies, to stun and repel enemies.
 * Axii: Axii is another sign Witchers can utilize. It casts a hypnotic effect to persuade people in a chat, or calm creatures like Geralt’s horse (Roach).
 * Hate-Reflecting Sign: While no official name is used, this sign is used by Geralt at least once. A telempathic sign, the spell absorbs an opponent's rage and deflects it back to them, spurring fear into the source.
 * Heliotrop: Another sign, this sign protects the user from magical spells, and impacts against walls or physical attacks. Heliotrop is only used against a single attack at a time.
 * Igni: Igni is a pyrokinetic burst that repels and ignites opponents. It can be cast in a gust or a concentrated flame.
 * Quen: Quen is a protective shield cast that protects the caster from attacks. Geralt uses this sign to protect himself from a Bruxa and Genie.
 * Somne: Somne is a simple sign that causes a being to sleep. Geralt uses it on Sorel Degerlund.
 * Supirre: Supirre is a simple sign that makes a nearby conversation audible to the caster. It’s a sign created by a blind Witcher, Warrit.

Abilities

 * Swordsmanship: Geralt was left by his mother at Kaer Morhen, the School of the Wolf for Witchers. During his time there, he was trained alongside Witchers such as Gweld and Eskel, by Vesemir. During his time training before the Trial of Forest Eyes, Geralt was taught several fighting styles with a blade.
 * Alchemy: During his training, Geralt was taught alchemy in the Witchers' laboratory, along with the others. This taught him to brew Witcher potions, and other alchemical substances.
 * Bomb Crafting: While not typically in a Witcher’s arsenal, Geralt picked up the bomb craft during his time while recovering from amnesia.

Equipment

 * Aerondight: Geralt was given this silver sword by the Lady of the Lake, near the southern shore of Lake Vizima. He later loses the sword in combat against a dragon, though the Lady of the Lake somehow regains the sword. During Geralt’s time in Toussaint, specifically Lac Célavy, Geralt is given the sword by the Lady of the Lake once more.
 * Iris: Geralt was given this steel sword by Olgierd von Everec, after saving his life. It shares the name of his dead wife, symbolizing Olgierd finally moving on.
 * Manticore Armor: This armor was crafted by Geralt in Toussaint, and he remarks he’s wore a set of armor similar to this before (Geralt wore a set of armor similar to this shortly after his amnesic journey began).
 * Journal: Containing Bestiary, Alchemical Solutions and more, Geralt was given a copy of his own Witcher journal he kept updated. He left it at Kaer Morhen, after he left the school with his child surprise.