She's enthusiastic about being examined!
"Starting from a raw soul, most of the time is spent waiting for the ambient planar alignment to convert the soul's material into aligned essence. You can do some mental training during this time, that's all. A living soul has bits of alignment stuck to it, at least where I'm from, and bits of the matching alignment make the process go a little faster if you measure closely, but this is only practically relevant for very strong souls holding lots of alignment bits.
An outsider who is already fully aligned, not matching the plane's alignment, won't change at all just by sitting around, and if you throw a bunch of aligned energy at them you'll kill them. Instead, you have to have them focus closely on pulling the old alignment away from a piece of tissue while you slip the new alignment in, continuously feeding both parts of their body with the right alignment.
For example, I used to be a type of angel that is sustained by their wings. When I became a cantor marrenai, first one wing was converted into my abdominal actuator. Then, each part of body other than my wings was surgically isolated from my Lawful Good bloodstream, converted, and connected to my Lawful Evil bloodstream. Eventually all my Lawful Good was concentrated into the remaining wing, which was removed and shipped to Heaven, probably, no sense wasting it. At that point I was anatomically a mess and needed two more years of surgery to take my current form.
Switching alignment needed all my concentration to not die, since Good and Evil are corrosive to each other, but during the ordinary surgery I could do mental training. I practiced thinking about priorities and remembering to do things until I developed specialized parts of my brain, which were then untangled from the rest and trained separately to become my Queue and Reminderbank, the two smaller lumps you felt earlier.
That's an awesome optical device!"
Her blood is slightly more viscous than human blood and homogeneous.
"I've never tried human medicine since becoming an outsider... medicine that kills a disease directly would probably work, but other stuff probably not. Capillary action? Oh, I see what you mean, I don't know if I even have 'cells'! Want to take a flesh sample and find out? 2 pence for a scratch, 2 shillings 8 pence for a coin-sized chunk.
I can get infections. Some material diseases don't spread to me at all, and most of the ones that do can be killed with electricity. A disease of opposing alignment will die immediately inside my body unless it's magically empowered. A disease of neutral alignment could be a problem, but we don't visit the Neutral Evil plane or True Neutral plane, and the Lawful Neutral plane is very careful with their public health. A Lawful Evil disease, if I were back in my world, would be trivial to cure if I noticed it at all, and might even make me stronger, but could be a problem here if I got sick and disoriented enough to be unable to assimilate flecks of Lawful Evil...I would probably have to get infected at exactly the same time as I was seriously injured.
I've never actually seen a sick marrenai, but I saw an angel's leg swell up and turn pink once?"