Somnum, Per Crux, and Quid mortale need a bit of toning down. Also, can you provide some translations for the Latin? It's gonna drive me nuts otherwise.
Workable, but I'm going to have to disagree with the 'mundane causing magic' bit. Perhaps Subject was attracted to her curiosity and hought she'd be a good candidate?
Additional lore incoming: can't believe I didn't think of this earlier!
What would a magical girl anime be without new powerups? In this case, they're known as Heart Crystals. Dropped by defeated Monsters and Villains, Heart Crystals cans provide magical girls with new attacks and powers, more mana, or further physical buffs. Sufficiently large ones might even be able to trigger short-term 'super modes', but they won't come easy...
Looks more or less okay. I definitely wasn't expecting an audition tournament in her backstory, but it'll work. Maybe only potential candidates could see it.
Also, one thing the Wise Scientist definitely is NOT is human. Humans can't be mascots. What she actually is is up to you, and she can certainly look human, but there's that.
I'm thinking about Chemistry or Physics for a theme to go with the general scientist motif my concept has. Sorry I haven't been that active, I've had guests over all week.
If you go chem, give me a holler if you need some ideas. Be nice to put my 100K wallhanger to some use...