Hailing from the planet Dathomir, a matriarchal tribal world, Mirus is strongly accustomed to a lifestyle that is far simpler than many in the Galaxy are used to. As a Dathomiri, he much prefers a lifestyle without many of the creature comforts that most take for granted, making him come across as a very plain sort of person. While he is not entirely useless at technology, he does occasionally struggle with the more advanced pieces of technology and, in many cases, is not an adept hand behind the controls of a vehicle beyond the most basic speeder or using advanced computer banks.

Mirus Hi'ija is a revived man in a cloned body, with all his old memories flash-implanted into him. While he has a much more positive outlook than many of his brethren thanks to his second chance at life, it occasionally leads to self-doubt and the odd memory lapse as he tries to recall things from before his revival. Occasionally questioning himself and who he is, Mirus struggles to find his place in the Galaxy the second time around - death has left a permanent scar on his psyche.

Women have been a central part of Mirus' life since birth - not because he is any kind of ladies' man, but because the society from which he hails is dominated by women and men are generally slaves or property at best. Fortunate enough to be family to a Dathomiri Superior Mother to avoid being a slave, Mirus is strongly accustomed to seeing women in positions of power. He has the tendency to defer to women thanks to this upbringing, knowing rather well thanks to more than one sickeningly brutal beating that traditional gender roles as many Galactic societies would expect simply do not exist.

With his new lease on life, Mirus is trying very hard to slip into the mindset of the Light Side. He puts in a lot of conscious effort to do the right thing by people, to listen and try to understand - a stark change in his personality from his time as a Dark Jedi. However, old habits die hard, and there are times that he slips back despite his best efforts not to; much of the Light Side, of simple altruistic compassion and sheer goodness, is still foreign to him.

Many in the Brotherhood use rage and anger as a powerful tool and an easy means to draw upon power through ‘rage’. Mirus prefers to, as a way to avoid running easily towards the darkness, draw upon his primal adrenaline to channel his desire to protect. Whether it be for himself or others, he uses this more altruistic desire instead of the simple concept of ‘rage’ - as the Light Side would much prefer. That is not to say he is in any way immune to the emotions leading towards anger and rage whatsoever; it is simply that he draws his core power from something other than the majority of the aptly named Dark Brotherhood.

Mirus lives up to the role of a Guardian – he seeks to protect without much thought of himself. He has the very strong tendency to fight on the front lines of a battlefield without thought of his own protection and will gladly fight fiercely on behalf of another if it means preventing an ally from being hurt. However, this is often at the detriment and cost of his own health and safety, where he could easily end up more injured than he would otherwise thanks to his own self-sacrifice: it has cost him his life once before and could reap the same cost again.