i really hope ur eyes aren't burned from how eyeburn glowy they are lmao
their talent involves opening portals to new universes, dimensions, alternate universes and times. they're basically limitless with this.. except their portals can only take one person and close after a while, which sometimes leads to terrible consequences, especially if things from other universes leak through.
the reason why elysium is so glowy and bright and neon is because of their birth universe; an alternate version of this universe, which was terrorized by nuclear warfare. the inhabitants of this universe after the war (like elysium's parents) grew up in the war-ravaged, toxic nuclear landscape, scraping for survival to create a new generation.
they thought the radiation had left their planet after the war, however when their children were born, they were born with odd colored fur and strange new mutations that they'd never seen before. manes, horns, hair, long tails, shark tails, too many teeth, radioactive spit, glowing parts.. their children had paid the price. the change wasn't just physical, however; some, like elysium, had strange powers and abilities. some used them for good.. whereas others used them for evil.
elysium decided to take the neutral path of doing their own thing. eventually, they became a kind of renegade vigilante, running through time and space to fix up problems; before realizing that they could do the best thing possible - via going back through time to before the war to stop it from happening. unfortunately, that didn't work out and they ended up slipping into our universe, their portal closing behind them. due to this, elysium is stuck in our universe until the next gravitational anomaly occurs - and they only happen every 30 years, so they're basically stuck here for good.
elysium is awkward with people as slang and ways of conversation and habits are very different compared to their birth universe, but generally means well and is usually pretty nice to people, although they are usually untrusting at first. however, once you get to know them they're a very kind and sweet person.