#outerimagines answer

I'll mainly give my headcanons for the general setting and save the majority of the character headcanons for character specific asks.

The setting: the monsters of outerhorror were exiled to their home planet's distant Ebott moon after losing the war with humans. A thin atmosphere is present that protects the surface from some of the harsher forms of radiation present in space but at the time of exile the moon was considered a non-habitable Class H plantoid.

After many millennia a human passed through leaving the monsters devastated, their king who had lead them dutifully from the beginning now forever gone. To make matters worse only a few short years later an asteroid made impact with Ebbot moon's surface, the resulting shockwave and debris resulted in major damage to Homebase 2. This event caused severe disruptions to the monsters food supply creating a system wide famine and a state of emergency to be declared. Now monsters live in a constant state of uncertainty, scavanging for resources and keeping watch for any sign of danger. In their current state one more disaster could be the end to monsterkind as we know it. For the moment though they depend upon each other in hopes of seeing a brighter day.

Homebase 1 (the ruins): The initial homebase of the monsters this biosphere habitat has long been abandoned by the majority of monsterkind. Many areas are completely inaccessible, the life support long ago turned off and the airlocks sealed. With barely any monsters left in HB1 life support systems are only active in a handful of places, the bare minimum needed to sustain life.

Homebase 1 was the least affected by the impact that devastated the surface of Ebott moon. However it did not escape the effects of the famine that followed. The monsters who had already lived a simple life were faced with a bleak future and adopted a Spartan way of life in order to survive.

Homebase 2 (new home): When monsters began to outgrow the confines of Homebase 1 a brand new habitat was built by order of the king. This habitat was designed to be expandable and has since grown to be quite large as the years went on and new habitat modules were added. Currently Homebase 2 is divided into five major zones. Each zone is covered by a biosphere with the majority of each zones living areas being located beneath the moon's surface. These excavated areas are known collectively as the Caverns.

Zone 1. The Snowglobe (snowdin): The Snowglobe was the first biosphere to be built and is the only habitat still connected directly to HB1, although, the airlock has remained sealed ever since the last human came through. When excavation below the surface began the habitat was discovered to have been built upon a series of icy caves and since then the biosphere has maintained a frigid climate. Monsters predisposed to these conditions quickly made a home for themselves there. After the impact the systems that kept these conditions stable began to deteriorate. Temperatures dropped and ice build up became a common problem in many areas. Traversing through the Snowglobe became a dangerous endeavour and with the strict rationing in place many monsters could not afford to expend unnecessary energy. To the untrained eye it looks like little more than a desolate frozen wasteland.

Zone 2, The Whirlpool (waterfall): The natural springs of water uncovered beneath Zone 2 were an unexpected blessing to the more aquatic monsters. However despite efforts being made to control the water's flow they were never able to fully cease the formation of whirlpools and occasional water spouts. The area soon became named after the former as a warning to those unfamiliar with the waters strange ways. Where the water originates from remains a mystery, but where ever the source may be at some point in its journey the water picks up pieces of space junk. This junk regularly rises and sinks within the Whirlpool's waters and many monsters became fascinated with the various human paraphernalia that would surface amongst the debris. After the impact the systems that had been built to control the Whirlpool's waters took the brunt of the damage. Without these systems the formation of whirlpools and spouts became not only more frequent but more unpredictable. Monsters had to learn quickly how to spot the signs of a sudden change lest they risk being swept away with the waves of swirling space junk.

Zone 3, The Hotspot (hotland): Unlike the previous zones this habitat is not built under a biosphere but instead immediately began with excavation inside a nearby mountain. Any area exposed to the surface was sealed with the same sturdy glass panes as a biosphere but from the outside the Hotspot looks more like a glass antfarm built into a mountain than a upturned fish bowl. The aforementioned mountain however turned out to actually be a dormant volcano with pools of hot magma dwelling below. These pools soon became Homebase 2's prime power source after the creation of Zone 4. The Hotspot took the least amount of damage during the impact. However despite the majority if its internal structures remaining stable the region has since had to deal with rising and falling magma levels. There are fears that the volcano may reawaken and should this happen Homebase would be divided in two. Solutions to this potential disaster are still being researched.

Zone 4, The Core (the core): The Core is the proverbial heart of the habitat, the source of almost all power for HB2. With its massive geothermal generators and vast halls of monitoring systems and cooling vents the Core is the final link between Zone 5 and the rest of the habitat. From the surface this zone is completely hidden, a behemoth of a machine that's runs day and night. The damage it sustained during the impact was devastating and it took every capable monster working together to salvage what they could. Working at barely a fraction of its previous capacity every monster was effected by its loss, like a ripple the damage would only spread with time.

Zone 5, Command Base (the capital): Command Base is the final habitat, the last stop on your journey through the kingdom of monsters. Beneath the grand curve of its biosphere sits the castle and beneath that the vast network of caverns the monsters call home. Once it was home to a beloved King, now the reluctant home of a newly appointed Queen. Like it's new Queen, this habitat weathered the storm and came out the other side with only minor damage. In the face of tragedy it stood firm and inspired its citizens to band together. As the name suggests this place issues the commands necessary to run a kingdom, but it also commands respect and loyalty. Despite the harsh new conditions the monsters now face as long as this place stands they will too.

Solar Flare (od!sans):

While his motivation to dance has certainly diminished over the years he never stopped his daily warm up routines out of pure habit. However, he has since developed a strange quirk that has manifested during his flexibility training. No matter what pose he's in, when he's hit with a bout of fatigue he will fall asleep without a moments notice. Whether touching his toes or doing the splits turn away for a moment and he could be out like a light. Though, seeing someone maintain a backbend while snoozing will always be a tad impressive

Flare tends not to use use shortcuts as much as other sans'. Why? Well... just like anyone he's prone to making a mistake or two, and let's just say you kind of lose interest in shortcuts after ending up in the cold vacumn of space one too many times. Sooooo, in order to maintain his lazy integrity he learnt the marvelous art of floating. Now he can float everywhere and anywhere without breaking a sweat. Watch out, he can even do it in his sleep. His use of anti-grav magic as become so fluid and frequent he almost always has a slight bubble surrounding him. Within this bubble his jacket and hat will hover ever so slightly. In an attempt to stop his brother from floating so much Eclipse bought his brother weighted high tops, this backfired spectacularly, I'll let you guess why.

As far as Flare's sense of humour is concerned he, like any sans, likes a good pun. However he's more inclined to indulge in physical comedy. Pranks are his bread and butter, no one is safe from his well placed whoopie cushions. From cling wrap over doorways to switching out sugar and salt, he loves to make people laugh with a well executed prank. Just make sure you stay on his good side, he's not above glitter bombing

Eclipse (od!papyrus):

Three words. Tear! Away! Pants! If he's wearing pants there is a 99.99% chance they have the ability to be torn away with a flourish for a dramatic reveal. If that wasn't enough, he tends to wear multiple layers of these marvelous creations. Long, short, plain, patterned, sequined or embroidered, like a Russian nesting doll, it's pants within pants within pants

One of Eclipse's favourite pastimes, outside ice skating and puzzle construction, is bedazzling. If given half a chance he will attempt to bedazzle anything, even his own face! His personal policy is "Anyone can make the world shine with a bedazzler, a 5lb bag of assorted rhinestones and a little bit of determination."

As far as cooking goes Eclipse is actually pretty, not that good... yeah. However he does had a talent for making freeze dried fruit, only fruit though, if it's freeze dried anything else I'd advise you to steer clear unless you have excellent dental insurance.

Wane (oh!papyrus):

When he's out and about scavenging, Wane tends to favour nets. He was a few on him at all times, from small to large. He usually brings in large amounts of scrap with his brothers help using his large fishing net. However his favourite has to be his pole arm net. He loves using it to scoop out items that he spies from a distance. Kind of like a game he doesn't always know what he's caught until he brings it in. You'll find he's pretty easy to spot from a distance, with his net slung over his shoulder he makes quite the striking silhouette.

Scavenging is a hard job in the habitat, but a necessary one. However lots of the scrap found just isn't suitable for use in repairing and maintaining Homebase 2. Not someone to give up though, Wane has found a new use for many of the rejected pieces. In his spare time he creates small 3D puzzles that he gifts to monsters around HB2. From Rubix cubes to interlocking jigsaws, he tries to make new engaging puzzles to help entertainment monsters of all ages.

Solar Flare (OD!sans) : Flare as a partner tends to embody actions speak louder than words. This doesn't mean hes the type to go out making grand gestures and orchestrating romantic displays, he just prefers quality time with his partner.

Out and about he'll do all the usual couple things, hand holding, hugging and a kiss here and there. He's not shy when it comes to PDA. His ideal date is a chilled out movie night. Flare likes being able to lavish you with attention from the comfort of his own home, though he's not above splurging for a night out on the town.

Because of Flare's tendency to use words to distract rather than inform he can find it hard say what's on his mind. He will benefit a lot from a partner who can initiate communication and who is upfront and honest with their feelings. Of course, this means the best way to fluster him is with words of affection. Tell him just how much you love him and he'll blush brighter than a blue giant classed star.

As the relationship deepens with his partner, Flare will find it easier to express himself using his words, although, he never quite shakes the habit of blushing whenever he says "I love you". Try not to tease him too much or else end up with a grumpy floating skeleton content on staying in hoods-ville for the foreseeable future.

Solar Flare (OD!sans) : Flare as a dancer is already going to be more physically affectionate than most, expect a lot of handholding, hugging, nuzzles etc. However with a smol s/o he goes one step further and will use any excuse to hoist them up. While he may not feel the urge to dance as much anymore he's still an athletic skeleton and likes to show off his strength, especially if it makes his s/o blush. Piggy backs, bridal style or seated upon his shoulders he makes his smol s/o feel lighter than a cloud of space dust.

Heheh well I guess my basic goal is to run a fun and engaging ask blog, specifically for space themed undertale AU's because let's face it, the aesthetic goes hard. I also wanted to run a blog that wasn't skele-centric, despite how much I love those blogs it did feel like the ask community was a bit saturated with them. So please, I encourage asks of all sorts, for all characters. I even answer asks about Jerry, albeit reluctantly

Eclipse (od!papyrus): Eclipse like most classic papyri is not one to do things by halves. He goes all out no matter the occasion.

For this ask let's assume this is a public date. Firstly, it's going to be something fancy. He'll pick his s/o up and take them out for a lovely dinner at a reputable restaurant. Then it's over to the theatre to watch a show, depending on what his s/o is into it could be anything from a concert, to a ballet, to an award winning musical. However don't think the date ends there cus the night is still young. Next he'd likely take his s/o out for a spot of dancing at a local bar. Nothing too rowdy, gotta keep it classy and tasteful, he does have an image to maintain. However no matter what the night brings he will always end the date with a bout of ice skating. Just him and his s/o, having some quality time together. While he guides them gracefully across the ice under a starry sky he likes to remind them that they are the most important thing in his life. He won't let them go home until he has appropriately flustered them.