Arzen

Arzen was a Marine Vice-Admiral and a Brother of the Aeons. He loves nothing more than experiments on living things in an attempt to make the perfect Navy soldier. He was the commanding officer of Marine Base G-4 in Paradise before his defeat at the hands of the Devil's Luck Pirates.

Appearance
Arzen is a large middle aged man with green eyes and a large white beard. In his first appearance he wears a blood-stained white apron over a green collar shirt and a black tie, a Marine Justice Coat, round glasses and a vat of green liquid on his back. The vat has many tubes that come from the vat and go into his body. After injecting himself with the green fluid, he had mutated wings and extremely muscular legs.

About 20 to 30 years ago, Arzen was a more normal-looking young man with glasses and a brown mustache with brown hair.

Following his defeat at the hands of the Devil's Luck Pirates and Trevor, he was rescued by agents of the Aeons and taken to Chronograd, where he was healed. He appeared in a form commonly called "Bio-Arzen": as an oozy, green, gooey creature, now without the tank on his back. Pieces of his own flesh and organs are attached to the gooey material.

Personality
Arzen speaks with a very prevalent (borderline comical) German accent and values science above all else, this can be seen as G-4 has at least one building completely devoted to experiments. He also has a habit of using German phrases or words such as "nicht gut", "Dummkopf", and calling people "sausages" and "Bratwurst" when he's upset. Arzen is ambitious and power-hungry: he was a founding member of the Aeons at their conception but his loyalty is questionable, as when he returned as Bio-Arzen he was quick to put his own goals of revenge and immortality before the cult's main goal, even going so far as to plan to kill the All Mother.

Arzen is a very sadistic and meticulous individual, finding pleasure in conducting painful, inhumane and often fatal experiments on his fellow human beings. He also seems to enjoy experimenting on himself, suggesting a degree of sadomasochistic tendencies. Arzen gets very frustrated when he doesn't get his way, as he kills Marines who don't move fast enough or disappoint him in other ways. After becoming Bio-Arzen, he no longer sleeps.

Overview
Arzen has incredible strength and scientific knowledge. He fights with the liquid in his vat. As a Marine Vice-Admiral and the supreme commanding officer of the G-4 Marine Base, he had absolute authority over the Base and all of its personnel, as well as unlimited access to all of its equipment and resources.

Strength
Arzen has the ability to hold a massive vat filled with liquid on his back for days on end. He also has proved his strength by ripping off Cyril's arm without difficulty.

Tubes
Arzen uses the tubes to make people fall asleep, boost his jumping distance, and damage people from the inside. Extensive use on anyone other then Arzen has shown their skin start to melt off of their body.

Scientific Knowledge
The vat on Arzen's back seems to give him a Bane-like strength boost. Too much of it has killed lesser Marines and seriously injured Trevor, but Arzen seems unaffected by it. Arzen also has some knowledge of surgeries, as his subject don't seem to die immediately, but over a period of time.

Haki
Arzen has access to Armament Haki, it is unknown if he also has Observation.

Bio-Arzen Overview
After being defeated and healing himself, Arzen returns as Bio-Arzen. In this state Arzen can more easily access his mutations. He is stronger and more resistant to physical attacks. He can also change his form at will, or summon goo creatures to fight for him.

Hand of Goo
Bio-Arzen can use his goo to burn those he touches.

Legendary Action - Goo Men
Using his Legendary Action, Arzen can summon 2d4 goo men to fight.

Shapeshifting
Being mostly goo, Arzen can easily access his previous transformation, like being able to grow wings. However, he can also adapt to opponents he's currently fighting, as be was able to partially turn into a bear and was able to gain the ability to attack three times while Ragnar was in a Frenzy.

Memory Affecting Goo
Arzen's goo has the ability to alter and affect the the memories of people. (It is unknown if this is a canon ability or a gimmick used for a joke)

Goo Explosion
Bio-Arzen's ultimate attack, as he causes a massive wave of goo to flow over his enemies, however, once he uses this move, he's reduced to 1 HP, as he uses up most of his goo.

Devil's Luck Pirates
Arzen hates the Crew for defeating him and destroying his base, along with some of his research. He also wants to conduct research on William, since he is a member of the D. Clan. However, despite his grudge, when he was overpowered by them on Chronograd he resolved to make a deal with them in order to make his escape, seemingly valuing his own life over revenge.

Cyril
Arzen appears to dislike Cyril after the young marine disappointed him, so he ripped off Cyril's left arm. As a result, Cyril hates and fears him.

Trevor
The two ended up at odds with each other during the G-4 Arc. During their fight Arzen remarked that he had never liked Trevor. The feeling turned out to be mutual, as Trevor starts screaming at him, revealing that he never approved of his experiments and thought of him as a monster. It turns out that Trevor only tolerated Arzen's behavior because he was his superior and because he believed that what the Vice Admiral was doing was ultimately for the sake of the greater good. Arzen ended up demoting Trevor during their fight, and although the demotion was never put into effect, it was still enough to make Trevor hate him even more. This hatred was great enough so that when the crew landed on Chronograd, Trevor ran off to find and kill Arzen as soon as he could.

Boss
Arzen was the one who experimented on Boss, causing him untold suffering in the process.

The All Mother
Despite technically being her servant and subordinate as a member of the Aeons, Arzen explicitly stated his desire to kill the All Mother in order to gain more power.

Hastings
Back when Arzen was still a Captain, he was apparently well acquainted with with Captain Hastings. Hastings trusted him enough to hand over his lieutenant to him as a test subject.

V
V and Arzen used to work together very closely, and V used to be one of the Four Brothers of the Aeons, same as Arzen. In Episode 36, Arzen went so far as to call him his friend. However, Arzen also thought V was insane and, being jealous and scared of his armor, he 'shot that shit into space', causing V to leave the Aeons.

Captain Verona
Captain Verona was Arzen's subordinate during his time as a G-4 Vice-Admiral. The exact nature of their relationship is relatively unknown, but they both loved engineering, tinkering, inventing and experimentation. Verona is also the biological daughter of V, Arzen's former partner and friend.

Rain
Marine Lieutenant Rain was handed over to Captain Arzen by her mentor and superior, Captain Hastings, for human experimentation. According to Hastings himself, this was done in order to make sense of the mysterious connection that Rain has with marine wildlife, including the Sea Kings, in order for her to learn to know herself better. However, it is clear that Arzen has never seen in Rain anything but a perfect test subject and a means to some potentially nefarious end.

History
Arzen killed his own brother and sisters when he was young, so they could never be used as a bargaining chip against him. When Arzen was young he was quite the player. About 28 years ago he helped Trevor join the Marines and taught him much of what he knows. In the ending scenes of Episodes 34 and 35 it was revealed that not only did Arzen perform human experiments on Rain, but he was also working together with V, the former Eighth Flame, during this time.

Arzen was based on Chronograd before he was killed by Ani-Bullet.

Trivia

 * "Arzen" is a slightly altered version of the German words for doctor and arsenic.
 * Arzen is the third member of the Aeons to be mentioned and the second one to make an appearance.
 * In D&D terms, Arzen's tubes did 12d6+8 (average of 50 damage).
 * Arzen is of course inspired by Nazi Doctors, he also has similarities to the Medic from TF2.
 * Arzen is the first character to be in two episode thumbnails
 * Arzen is the first character who had the ability to use Haki in a fight, but didn't
 * Arzen is the second creature to be killed by one of Verona's animations
 * Arzen is the first creature to be killed twice
 * In a Euro Truck stream by Rustage it is confirmed Arzen was a Player in his youth and is not a virgin
 * Given that Arzen has a German accent, and Law was stated to have been German if he was a real nationality, Arzen could potentially have been from Flevance or at least a country on the same island as it.

Quotes

 * "It's okay, I just want to do one little thing, one tiny thing."
 * "This will only hurt... a lot."
 * "What is this Marine's name? Cinnabon?"
 * "Guten tag! It's been so long!"
 * "The research works! Look at me reborn again! It would make a grown man cry, but instead...I will kill you!"
 * "I had to send zat shit into space!"
 * "Look at me! I beat V! He was so old and I beat him! I am the victor! And now I kill you, then I'll kill the All Mother, and then I'll be the only one that lives forever!"
 * "I like ze bear thing!"
 * "The bear cannot throw little sticks! So pathetic Ih-Ah-Ah-Uh-Uh-Ih-Ah!"
 * "Nein!"
 * "This is impossible! It is not good! What is this inside of me?!"