Marcus Quince

"I'm going to cure the world of you freaks."

Marcus Quince, otherwise known as Dr. Geode, is the central antagonist of the fanfiction Steven Universe Future sequel Happily Ever After.

He was born in a time that was only a few decades after the Corruption and saw his family killed by a corrupted gem solider. he managed to shatter it, but the shards of the creature imbeded themselves in him, giving him powers and longivity. He then began a quest to end the gem empire forever.

Appereance
Marcus has three main looks throughout the series, two of which are human-like, while one is monstrous. His first form is the one he's had since he was little. He stands at 6'0 feet in height and has a slim, but muscular physique. he has yellow eyes and short dark blue hair, which he braids back into a short ponytail. his normal attire is a typical doctor's outfit, but with a hole in the center of his chest, where bits of gem protrude from. after he's poofed and reformed, his body looks the same, but his hair now reaches his heels like a normal quartz solider and his skin has a light blue color.

His non-human form is a large kaiju-like monster. in this form, Marcus has four arms, a pair of bat wings, three horns on his head, two large spiked legs, and the color of his body is dark blue.

Personality
Marcus began as kind spirited, but after his family was killed by a corrupted gem creature, he developed a deep hatred for gems. During his time through history, Marcus has displayed a very calm and sophisticated attitude towards others, but is visibly anger when gems are even mentioned. When he finally meets Steven and the Crystal gems face to face, he still has his normal personality, but when he fights he displays a more savage and ruthless persona.

Most of the time, he displays a very funny and upbeat persona when meeting with Steven, but acts more serious when the two fight.

He is able to remain calm, even in the most stressful situations and even acts calm when he is about to be poofed. he does have a partial god-complex, believing that with enough time, he'll be able to challenge the whole gem empire single handedly.

History
Marcus was born in the first civilized era of human existence and had a family, which consisted of a mother, a father, and a brother. one day, his village was attacked by a corrupted gem soldier and no one survived. he managed to defeat the creature and shatter it's gem, which the pieces were embedded in his chest, giving him all the abilities of a normal gem. he lived for millennias, keeping track of all the living gems on the world. he began hunting them and taking their gems to experiment on how they work and function. he allowed the crystal gems to continue bubbling corrupted gems, since they were technically protecting the world.

when he learned that Rose Quartz was the diamond that invaded his world and that she was going to have a child, he was thrilled there would be someone else like him.

Abilities
Human/Gem Physiology: Marcus was once an ordinary human being, but after having the pieces of a gem embedded into his body, he was endowed with gem attributes and powers. Marcus' gem half on it's own isn't very powerful, but his human half enhances his gem half with its natural ability to grow and change. this ability allows him to overpower most foes and gain strength beyond anything previously seen, however if he's met by another hybrid, he can be overtaken by them.

Human Abilities

 * High Intellect: having lived since the dawn of human existence, Marcus has learned a large amount of information. he has also used the information stored in crashed gem ships to learn nearly everything about gem science and engineering, making him even smarter than both Peridot and Pearl. finally, since he's preformed countless experiments on gem shards, Marcus has attained an understanding of gem biology that even gems don't have.
 * Indomitable Will: Marcus is able to go to any lengths to achieve his goals, which can include waiting for centuries, experiencing great pain, and killing anyone who stands in his way. this can even allow him to resist White Diamond's mind control.
 * Expert Martial Artist: having studied and mastered every fighting style in human existence, Marcus is able to hold his own against opponents much stronger than him and even win.
 * Weapon Proficiency: having been there for the creation of each type of weapon, Marcus has mastered each and every kind of weapon, but mostly prefers firearms.

Gem abilities

 * Enhanced Strength: thanks to the gem shards in his chest, Marcus is able to lift things almost 25 times his own weight and size. his strength can outclass fusions and even the diamonds, with the only one able to match him is Steven. his strength can even be augmented by his human biology through training and working out. after injecting himself with G-serum, his strength outclasses all opponents, except Steven in his pink form.
 * High Durability: Marcus has great resistance to damage and harm, allowing him to fight without regard for his own safety. he compares his durability to that of a diamond, which are the only beings who can harm him. after being injected with G-serum, the only one who can hurt him is Steven.
 * Enhanced Stamina: once again augmented by his human and gem parts, Marcus is able to go on for days without exhaustion. this allows him to also fight until his opponent is too tired or too wounded to continue.
 * Enhanced Speed: Marcus is able to move at speeds that allow him to even be in multiple places at once. he can move fast enough to where time slows down slightly, but not as much as Steven. his speed is increased even further after being injected with G-serum, which allows him to keep up with Steven at his fastest.

Powers via gem shards

 * Weapon Summoning: like all gems, Marcus can summon a weapon from the gems in his chest. unlike other gems, Marcus is able to summon multiple types of weapons, all of which are even imbued with powers.
 * Shapeshifting: much like other gems, Marcus can alter his form in any way he wishes, but prefers not to.
 * Bubbling: much like other gems, Marcus is able to produce bubbles around small objects.
 * Gravity Shifting: like other gems, Marcus's body automatically shifts to match the gravity of the world he's on. Marcus has learned to control this and can make himself as light as a feather or heavy as a mountain.
 * Longevity: Marcus has lived for thousands of years and shows zero sign of age, meaning he is immortal like other gems.
 * Fusion: Marcus is able to merge his body with other gems and can even merge with humans.
 * Regeneration: if Marcus is ever harmed, then the gems enhance his body's natural regeneration, allowing him to even grow back severed limbs or his head. if his body is broken beyond repair, then he poofs and goes into his gem shards.

Powers via G-serum

 * Pyrokinesis: using a ruby's essence, Marcus gains the ability to produce fire.
 * Hydrokinesis: using a lapis lazuli's essence, Marcus gains the ability to control water.
 * Flight: using water wings and shooting fire from his feet, Marcus gains the ability to fly at fast speeds.
 * Cryokinesis: using a sapphire's essence, Marcus gains the ability to produce ice.
 * Ice Golems: using both hydro and cryokinesis, Marcus creates golems made of ice.
 * Future Vision: once again from a sapphire's essence, Marcus can see into the future, but only by a few minutes.
 * Electrokinesis: using a fusion of ruby and sapphire, Marcus can shot bolts of energy or power large machinery.
 * Telekinesis: using a peridot's essence, Marcus can move things with his mind, but is not limited to just metals.
 * Tool Hands: using bismuth essence, Marcus can turn his hands into multiple tools and objects.
 * Rubber-like body: using spinel essence, Marcus can shift his body in a multitude of different ways. this can include growing his muscles to increase his strength or morphing his appearance to impersonate any person. This also gives him immunity to impact damage, but not strong burns and cuts.

Relationships
His family: Marcus has described his relationship with his family was a very good one and that he loved them more than anything. he was devastated when they were killed and vowed to avenge their deaths.

Steven Universe: Marcus sees him as both an enemy and a possibly ally. believing they were both flung into a world they never asked to be apart of, Marcus tries on many occasions to make Steven join him. he finally sees Steven as an enemy when he accidentally destroys a family memento. he grows to hate Steven when the latter repeatedly tries to convince him that gems are good. even after fighting along side him against his experiments and old allies, Marcus still chooses to leave, but slightly warms up to his old enemy.

Crystal Gems: Marcus has little interaction with the other gems, but still has great hatred towards them. he grows to respect their teamwork and dedication, but still holds resentment towards them.

Jasper: she is possibly the only gem Marcus slightly likes, since she hates the crystal gems as much as he does. he also doesn't like her, since she has hatred for humans and the earth.

The Diamonds: it's shown that Marcus hates them most of all, since they led the attacks and colonizations of worlds before. Even after they attempt to apologize, he becomes angrier at their inability to accept the punishment for their actions.

Equipment

 * G-Serum: a compound made from the essence of gem shards, which can endow a person with the abilities of those gems. However, overuse leads to the body deteriorating.
 * Anti G-Serum: a reversed form of G-serum that can either turn a human/gem hybrid fully human or permanently kill a gem.
 * Perfected G-Serum: having the essence of a spinel gives the user a rubber body, which can take the strain of so much gem power.
 * Lab coat: Marcus is mostly seen with a white lab coat.
 * Magic Pistols: in addition to the other weapons he summons, Marcus usually uses a pair of Colt .45s, which never run out of ammo.
 * Imbedded Gem Shards: a couple of gem pieces protrude from his chest, which endow him with many gem abilities. These were later ripped out by Steven.
 * G-Serum Suit: a full body armor that constantly circulates g-serum into the user's body.
 * Gem Farm: a massive structure, which generates numerous gems to be turned into g-serum.

Quotes
"Are you familiar with the legend of the Nephilim? the story goes that many years ago, angels came down from the heavens and had children with humans, creating a new breed of creature, which were foretold to become stronger than the sum of their parts." Marcus explaining to Steven what they are.

"You really think an apology can make up for what you've done? No, you need to pay for the worlds, the families you've destroyed." Marcus after The Diamonds attempt to apologize.

"yeah, you like it? I built it after you tore out my shards, which was very painful, by the way. it constantly pumps my body with g-serum, which I now need to stay alive."