How strong is she, magically speaking? Is she the most powerful person in this universe? (Seems unlikely!) One of the top ten? Top thousand? Top fifty percent?
These are difficult questions to ask the memory of somebody who did not know what a fraction was! Healthy-Orphan never met a magic-user she could not completely crush using brute force at the time she met them. On the other hand, she didn't know anything about how to string lightlines between planets (she did know vaguely they were called lightlines). The Dread Emperor is supposed to have cosmic-scale power of some vague kind and Orphan hasn't even tried uprooting any mountains.
Her predecessor seemed to favor fire, at least in the battle they shared. Did she always favor fire? Is that because she's especially good at fire, or because fire is scary, or some other reason? Are there other kinds of magic, like water and earth and so on, or does it not work like that here?
There are all kinds of weird things that magic is said to be able to do in legend! They proooobably aren't all true unless the Dread Emperor literally once got hungry and ate a planet! Orphan used fire because it was simple and reliable. Magic can transmute base materials into weird new forms, some of which are long-lasting enough to form roads or scythes. Magic can keep food cold or heat it up again. Magic-users can fly... oh, Orphan has flown, but the first time she tried it, she got all airsick and threw up in midair, then frantically instinctively tried to get back on the ground again, then crashed into the ground hard enough to break her shields and some ribs. Orphan never tried flying again after that.
How is magic fueled? Is it just for free, or is she draining her own life force, or the life force of other people, or the mystical energy that makes grass grow and birds fly? Does she get extremely tired or extremely hungry after she uses magic?
Other magic-users supposedly get tired! This has never happened to Orphan. If anyone knows about a deeper thing that magic draws upon, they haven't explained it to Orphan.
What are the limits to healing? She got her whole hand back, that was great! What if she'd had her back broken (as she did to those knights) or lost 99% of her blood or been decapitated? Is it possible to raise the dead, and are they basically good as new afterwards or is there some terrible price to pay? Does it matter how long you're dead?
Orphan's memory has a vague notion that dead dead isn't reversible, unless the person died around a necromancer who prepared for that happening in advance. Her instinctive healing works reliably on herself, but when she tried it on a follower who'd lost a hand, the follower ended up growing a weird sickly 'that is not how a hand looks' hand and they ended up cutting it off again. She once kept a woman giving birth and hemorrhaging from dying of blood loss, but the woman died as soon as Orphan got tired and stopped keeping her alive. The woman looked all pale so Orphan's guess was that magic was not making more blood inside her. Magic in tales and legends can do things like shrink a person down to six inches, turn them old, or give a man tentacles so that he can impregnate all the women in a town in a single night. These may or may not be reliable; Orphan didn't think of tales as really being things which were true-false rather than fun-unfun.
Opalyn doesn't particularly expect this question to work, but does this place have physics at all? Like, is there conservation of matter, for example? When Opalyn shot out that circle of force she made it a circle rather than a wedge directed at the knights because she didn't want to get thrown backwards with equal and opposite force, but did that actually matter?
Orphan's memory has never heard of any quantity in reality being conserved except for money. She's never heard anyone suggest that if a thing goes in one direction then some other thing ought to go in the opposite direction, with or without magic being involved.
On examination, however, magic maybe has to transform stuff rather than make stuff, at least all the magic that Orphan has personally used or witnessed, rather than stories where somebody captures a witch and tortures her into a raising a castle in a single night. This might be another reason that Orphan attacked with fire blasts rather than like materializing bullets or something.