Eridan Ampora

Eridan Ampora, also known by his Trollian handle caligulasAquarium, is one of the Sea Dwelling Trolls. His associated zodiac sign is Aquarius (♒). His Team affiliation is Blue.

His name is derived from the river Eridanos, which was poured onto the Earth by Aquarius in Greek myth, and the amphora, a type of Greek vessel for carrying liquids which is often seen in depictions of Aquarius. His Trollian handle is presumably taken from Troll Caligula.

Biography
Eridan is a Sea Dweller and a member of a very high caste. The typing quirk he uses (doubling v and w) is a reference to the Aquarius symbol, both forming a zig-zag shape representing waves.

Eridan dresses very flamboyantly for a troll, wearing a large quantity of rings, an extravagant, high-collared cape, and a billowing scarf. He has a purple highlight in his hair, making him the only troll to have hair that isn't entirely black, and has crooked horns reminiscent of the Aquarius symbol. Eridan's fashion sense, inasmuch as the term can be used to describe how a troll dresses, could be likened to a combination of supervillain (the cape and jewelry) and hipster (the pants, shoes, glasses, and hair).

Eridan wields Ahab's Crosshairs, a weapon he found in a ghost ship along with Vriska's Fluorite Octet. The very first thing he was seen doing was using it to kill HS 4314 (a flying whale). He did this to feed Feferi Peixes's Lusus, in order to keep its voice down.

According to Terezi, Eridan was part of a "conspiracy" that had foreknowledge of Sburb, although he has never demonstrated any. He is the member of the Nautical Aristocracy that wants one of Vriska's HS 4106 (doomsday devices), apparently intended to kill all land dwellers. He is Feferi Peixes's moirail and claims that he and Vriska would become kismeses without Kanaya's intervention. The biological differences between aquatic and land-dwelling trolls are unclear as of now, but both Eridan and Feferi are unique among the other trolls in that they have fin-like protrusions on the sides of their heads.

Eridan's hive appears to be the ruins of an antiquated ship, lodged upon black rocks on a small island. This shows that Eridan is comfortable with breathing air, despite his fin or gill-like facial protrusions. In fact, Eridan spends the vast majority of his time above water, although he claimed this is only so he can more effectively wipe out the land dwellers.

Being introduced last along with Feferi, Eridan appeared the least of the twelve trolls during Hivebent and currently has the least number of appearances for a Troll character overall. He was the only troll whose Planet was not seen during those introductions, and he was also not given a Mythological role at the time, an exclusion he shared only with Gamzee.

Personality
Eridan has an affection for tales of historical leaders, conquerors, and military history. His passion for these extravagant stories of conquest and glory lends itself to his overly theatrical mannerisms and his massive ego. As a result, people tend to see him as a "bit of a tool". He also likes magic and wizards, even though he knows that magic obviously doesn't exist. This may be a contributing factor in his vaguely Harry Potter-esque appearance.

He loathes Land Dwellers and the litter they produce. His hate for Land Dwellers extends to such a level that he has devoted himself to killing them all, as a result of an overpowering genocide complex. He aims to achieve this goal through the collection of deadly weaponry, such as the absurdly overpowered rifle that he wields, and the pursuit of a functional doomsday device, one of which he solicits from Vriska. Much of his weaponry and resources were amassed through sweeps of extreme roleplaying, making him one of five trolls known to partake in that particular sort of game. His character's name is Orphaner Dualscar, a fellow Petticoat Seagrift like Vriska's Marquise Spinneret Mindfang. The two were an unmatched alliance and brutal competitors. Typically trading and sharing the prizes of victory, Vriska would feed the victims of their conquests to her Lusus, while their lusus would be fed to Feferi's gargantuan lusus to keep her happy. Kanaya says that he has a ridiculous accent, but what kind of accent this is is indeterminate, although Andrew has said that he pronounces his "vv"s (double v's) as "w"s. This is likely because "v" is pronounced with a "w" sound in Latin. Eridan also has a tendency to swear rather a lot - though not as much as Gamzee - and thus appears to not fully appreciate the moral guidelines that are lent through his royal heritage. (Because of this, it is likely that Equius does not get along with him.)

Despite being a bit of a tool, his overbearing natures, and his desire to kill all land dwellers, he does seem to be a little empathetic towards others. He just hides it really well. When told by Gamzee that Sollux is dead, Eridan immediately felt guilty and stated that he felt like an asshole- which he kind of is sometimes.

Relationships
Eridan is the kind of person troll that tries to have a romance with every female that gives him the time of day, and he has four times as many romance options to pick from. He has a mating fondness for Feferi but didn't "play his cards right" (as he implied in a conversation with Kanaya and then later admitted to Feferi), leading to a moirallegiance between them in lieu of one more concupiscently-inclined, which he would have preferred. He also appears to be seeking kismesissitude with Vriska, but he has been completely shut down by her. After Feferi's entry into The Medium, she terminates her moirallegiance with Eridan as a result of Eridan's overbearing and taxing nature. This devastates Eridan. He is later seen attacking Sollux (with whom Feferi may have developed a matespritship), presumably in jealous rage. The flash game revealed that Eridan was seeking a kismesissitude with Sollux, and possibly had ashen feelings for Terezi, but both turned him down. It's also revelealed that the Seer (Rose) destroyed his computer and he started to develop a Kissmesissitude towards her.

He does seem to have a strange friendship with Kanaya, valuing her for her apparent mediation skills, and he goes so far as to claim that he wouldn't kill her along with all the other land-dwellers. Despite his more sinister intentions, he seems somewhat petulant and relies on the support of Kanaya and Feferi to get by. He is described by Kanaya as overbearing, to the point where he has been blocked on Trollian by Vriska, of all trolls. Like many of the trolls, Eridan seems to regularly seek romantic advice from Karkat.

Lusus/Kernelsprite
Eridan's Lusus appears to be a large sea horse complete with saddle, which he rides into battle. He rides his Lusus while hunting for food for Feferi's gargantuan Lusus, supposedly out of obligation to Feferi.