Named for French nobleman Anton Lavoisier; the one to discover that sulfur was an element and not a compound. Mirrim is just the word mirror made into a palindrome.
Blood colour: #3B60B8 Bloo
Gender: Agender with no particular leaning either way. "They" is their preferred pronoun.
Symbol:

The Leviathan Cross. It's original meaning was related to the concept of the equality of life, but at some point was adopted as a Satanic symbol. It's the alchemical sign for sulfur, under which practice it was used to treat a variety of skin conditions.
Profile: Oisier and Reisio are twins. As far as Oisier is concerned, this is the most imortant facet of their life. Genetics are a tricky subject on Alternia, with offspring being hatched generations apart from their parents, and emerging from a random collection of material all processed by a single mother grub. Siblings are typically only ever heard of in a metaphorical sense. Oisier and Reisio are an exception, however. They are unquestionably one in the same--mirror images in every way. They are a single entity. This is their stalwart belief as much as it is often literally the case, as their natural powers allow them to merge their bodies together. It's obvious to them that they are a superior troll, gifted with twice the brains and twice the strength of any of their peers. Their blue blood is simply further evidence to the supremacy they already knew they possessed.
Demonstrations of their power are more for their own comfort than as a means to show off. (Who cares what gawkers think anyway?) Oisier hates having their sibling out of their sight and will more often be the one asking to be "carried." For the most part though, they settle for hand-holding. They don't like to be the center of attention, less so if Reisio isn't included. Their belief in their oneness leads Oisier to want to be considered interchangeable for their sibling. If their strengths or interests ever differ, it must be in a way that compliments the other in order to maintain the equilibrium of their perceived perfection.
To that end, Oisier could be considered the more "intellectual" troll. As rigid as they may be in their ideals, they're still prone to getting lost in their own head. They would absolutely never let anyone know, but they're a worrier. It's perhaps the only trait Oisier attempts to hide from their sibling. They spend a lot of time coming up with contingency plans to anything that could go wrong in their life. It's their duty as a highblood to control the chaos of the world around them. It's for the good of all trollmanity, really. They're quite noble. Oisier is always eager to participate in the higher echelons of society and adores being treated "like an adult." Sometimes it can get difficult to remain both serious and mature while simultaneously being so giddy. They are most comfortable in organized events with plenty of social constructs to navigate. Oisier is definitely not the kind of troll that enjoys camping. They're the type of highblood that doesn't know how to cook and outsources their laundry. The twins do cut their own hair though.
When Oisier isn't preening, they join Reisio on treasure hunting expeditions. Both twins enjoy both urban exploration and that of abandoned ruins. Oisier is most passionate about places of historical significance, and enjoys making maps based on their outings. Their desire to plan ahead has spread into an interest in the occult. What happens when trolls die? They've heard of ghosts being a thing, but how do they even work? Does that mean other ethereal beings exist? The ritual aspect of occultism also appeals to Oisier, but they're just a touch too superstitious to try anything. They like spooky campfire stories as much as they do informative texts.
Strengths:
Principled
"What sort of troll would I be if I let this slide?"
Oisier takes immense pride in being a highblood. Coupled with their love of order, Oisier does their best to live as the picture of a proper highblood. While it can be difficult not to make snide remarks to Reisio within hearing range of others, Oisier does have a good grasp on ettiquette and social conduct. They know that their blue blood doesn't mean they can get away with just anything without consequences. They watch who they actively antagonize, and will openly extend generosity to those that they believe worthy or potentially useful, with caste only being a "minor" concern. They may not care to make friends, but they want to make enemies even less. Most important, however, is that they don't want to make a fool of themselves.
Informed
"Have you heard about what's going on downtown? Well..."
Just because Oisier is emotionally uninvested in what's going on around them doesn't mean they don't like to know both current events and historical backgrounds. They're very diligent in reading the news, eavesdropping conversations, and doing their research. While they're often annoyed when they're not the most well-informed troll in the room, they'll do their best to stay on good terms with a potential source of information. Oisier's specific areas of interest include military excursions, conflict between political figures, and oddly enough, rumors of supernatural activity. They'd love to one day meet a ghost.
Composed
"Hm? Oh, that. I don't see what the problem is."
Even when separated from Reisio, Oisier isn't a reckless troll, even if they are incredbly nervous. When together with Reisio, however, Oisier feels completely at peace with the world. Why wouldn't they? They're blueblooded aristocrats with powers that put them a notch above even that. They're a prime specimen of trollhood, and since Reisio and their lusii's opinions of them are the only ones that matter, they have a 100% approval rating. They're unphased, and even amused by criticism--particularly from lowbloods. From other highbloods they'll take their suggestions into consideration, but mostly just to keep from making waves. They'll revert right back to normal once out of view/earshot. They're not easily offended or angered. They will, however, begin to crack if they feel they've been embarrassed or done a disservice. They also become annoyed at having to explain something multiple times, but will do their best to channel their ire into a condescending tone rather than violence. Letting outsiders know that they've gotten to you is a weakness Oisier refuses to stand for.
Flaws:
Co-Dependant
"What do you think, Reisio?"
Oisier's relationship with their twin is the basis for their entire identity. They consider each other to be extensions of the same body. However, despite their insistance otherwise, they are two individuals with their own thoughts and feelings. There are inevitably occasions of disagreement or confusion between the two and when it happens it scares the s**t out of Oisier. Oisier is positively phobic at the idea of conflict between themselves and Reisio. It's to the point where even if they did disagree with Reisio for completely valid reasons--even safety concerns--they'd go along with it anyway. They would try to force themselves into believing it was their idea all along. In the event they are separated under "normal/non-threatening" circumstances, Oisier becomes visibly shy and prone to panic. If they can't get to Reisio, they'll stick close to any available person. It could even be someone they openly dislike so long as they aren't a complete stranger. They have a very hard time talking to others by themselves, but will at least be considerably more polite. Don't expect the good behavior to last a second longer once reunited with Reisio, though.
Inflexible
"I- Stop! Wait a moment. I don't..."
Oisier is resolute in their beliefs. They've lived their entire life thus far in the constant companionship of someone that supports everything they say and do. It's the source of their confidence and ambition. Anyone that tries to contradict them is either ignorant or malicious. The moment they're forced to question their own values or opinions, however, Oisier shuts down. When it comes to culturally ingrained topics like the hemospectrum, Oisier can't actually comprehend trolls that operate outside of their intended positions. Personal affronts, such as losing an argument, are handled much worse. The result tends to be some sort of tantrum and a subsequent grudge. They adapt to change poorly and are slow to make decisions when their initial plans have gone awry. Thinking on their feet is not their strong suit.
Off-putting
"This topic is beneath me. Do you have something interesting to talk about?"
It's obvious Oisier and Reisio's relationship gives them a unique view of the world. Perhaps it's a bit too unique. They have a hard time understanding the thoughts and feelings of other trolls and in turn are not capable of coherently explaining their viewpoints to others. If there is a difference in opinion, Oisier is simply right, and everyone else is wrong. Wrong with bad taste. Sometimes Oisier will be disagreeable with others just to press their buttons. Reisio and occasionally their lusus are the only ones able to phrase new concepts to Oisier in a way that makes sense (or that they'll take seriously). As much as Oisier enjoys new information, they care far less for the "whys" than the "whats." Abstract ideas such as ethics or empathy are considered basically useless. The simplest reason for this is that Oisier hates anything they find to be the least bit frustrating. It's a driving factor in their love of ettiquette, as it gives the illusion of having social grace. Their highbloodedness as well as their bizarre biological circumstances make it difficult for Oisier to relate to others on a personal level. This causes them to withdraw, which only makes it more difficult to communicate. It's a cyclical problem. They have a bad habit of choosing to talk to Reisio about another troll in front of them without actually speaking to the person directly. It's a snooty highblood behavior, but it stems from their own social awkwardness. Oisier speaking casually to a troll unprompted is typically a sign that they like them quite a bit.
Weapon: Oisier trains to one day efficiently wield a sickle. Attempted spars with their sibling have been inconclusive due to their overwhelming knowledge of each other's movements.
Appearance: Oisier is a young troll of average build with an oval face and flat nose. Their hair is styled in a dramatic bowl cut and topped with symmetrical horns that curl slightly outwards. Their lips are particularly dark for their age and are framed by jutting top and bottom canine teeth. They tend to have a dull expression, emphasised by a lack of eyebrows and dark circles surrounding their eyes. Most strikingly, or perhaps most unfortunately, Oisier has a lazy right eye that tends to drift off to the side of its own accord. While they've had their whole life to adapt to this trait, they still have a hard time viewing things at a distance. Visual acuity in the off eye is extremely low. With the exception of bright lights and particularly dramatic movements, Oisier is essentially blind in that eye.
With the exception of their opposing lazy eyes, Oisier is a perfect copy of their twin, Reisio, down to the clothes they wear. Their look is prim, but combat-ready, in appearance if nothing else. They wear a white tabard with hemotyped trim belted over black underclothes that are tucked into shiny plate metal boots. In general, Oisier has an uncommon appreciation for white clothing. They like how striking it looks to wear something so obviously clean and pressed.
Home: Oisier and Reisio live in a penthouse suite atop one of Civisect's newer hivestems. It has an incredibly clean, modern aesthetic and displays plenty of abstract art and sculpture. It's furnished with a lot of glass for a home occupied by two children. Its tall ceilings and liberal use of granite gives the hive a cathedral-esque atmosphere. Of course they have the best automatic blinds that money can buy, but during the night they enjoy looking down over the city.
They do in fact have bunkbed recuperacoons. They regularly trade off so they both get to sleep in the top bunk.
Lusus: Oisier refers to their lusus as Planariant, and finds themselves very clever for it. It's an Alternian flatworm approximately as long as Oisier is tall. It's a physically unimposing lusus, save for the vertical mouth full of pointy teeth that runs down its belly. Oisier and Reisio's lusii used to be a single flatworm, but it got into a skirmish with another would-be lusus over rights to the twins shortly after the children's wiggler trials. In the process, the flatworm was split in half, forming two separate entities, overwhelming the other creature and thus solving the lusus debate. Only the twins are capable of distinguishing whose lusus is whose. While Oisier is nothing but respectful to their sibling's lusus, they are decidedly closer to their own parent for comfort and guidance.
As a lusus Planariant is gentle and reserved. It comes more from a mindset of superiority rather than kindness, but they do dote on Oisier. Considering both their high blood color and similar biological history, Planariant vehemently believes their child to be a mark above the rest. Reisio is a fine young troll too, but Oisier is theirs, and therefore a more direct indication of Planariant's excellent parenting skills. Said skills manifest in constant encouragement and affirmation. While Oisier finds the gushing to be embarrassing, there's no doubt all of the praise has left its mark on them. They're not so rude as to overtly flaunt their status, but also won't be bothered by anyone taking offense to anything they say or do. Consideirng Planariant's tendency to magnify their charge's strengths, Planariant finds Oisier to be a very polite, upstanding gentletroll. A smart highblood doesn't pick needless fights, but they also don't concern themselves with the nonsense-talk of ignorant lowbloods.
While Oisier knows that it would be near impossible to disappoint their lusus, the mere thought of it frightens them immensely. If Planariant feels strongly enough to actually tell Oisier to stop doing something, they will abide immediately. Oisier considers Reisio and their lusii to be the only beings in the universe capable of completely understanding them. To lose their support for whatever reason would be a devestating blow, so Oisier tends to air on the side of caution. They may consider their lusus to be silly at times, but Oisier does deeply cherish Planairant's unabashed support, especially due to the rest of their "family" being relatively reserved.
Power: Genetic Osmosis (Support Type B)
Oisier and their twin have innate control of their molecular structure. They're capable of temporarily merging parts of their bodies with other trolls. Through this the twins are able to essentially arrange a troll's own flesh to quickly and efficiently graft over wounds. Due to the twins' identical biology, they're capable of merging with each other to the point of becoming a single body with two heads. With other trolls, however, the technique requires a great deal of concentration and understanding of troll physiology to let so much as their fingers to slip in. It's also easy for either party to accidentally or purposefully reject contact, basically spitting Oisier back out. As such their power is useless as an offensive technique.