@griseousaconite it's pretty funny that you requested witch of light when it was already requested and it lined up so that it was the reply under your requests lol. I'd remind everyone to look through to make sure you're not requesting something that's already been done but I guess if you need that reminder you wouldn't see it :p

Maid: Someone who repairs and keeps their aspect under control. It’s also a pun, as they are metaphorically (maybe literally for some aspects?) made of their aspect, which lets them lend their aspect to others when they need help. 
Light: Knowledge, particularly narrative knowledge and narrative importance (spotlight), fortune, luck, literal light, foresight, literal sight. Often associated with emotional instability, likely due to the trope of people going mad when they've attained too much knowledge.

I think a Maid of Light would be someone who's naturally both very smart and very lucky. They'd need to have some other shit wrong with them to prevent them from seeming too perfect, and it'd be fitting but not necessary that they're a bit emotionally unstable or misguided. Or they could also just be bad at their job. Some maids are.

But I digress, a Maid of Light would probably be lucky and smart because of the whole "made of" pun. This would also mean they could be extremely important to the story somehow. Given that Maids keep their aspect under control by any means they deem necessary, they'd at the very least try and make themselves important.

They'd assert themselves as or inadvertently become the character that's in charge of keeping track of things and learning how to play the game. If they created a walk-through like Rose did, the difference would be that they stick with it and keep track of literally everything they learn. Knowledge would come to them some way or another, perhaps similar to Rose, or perhaps just because they're put into the positions necessary to learn things by the story itself.

They could also do things or have abilities to pull the luck of the session and their party in their favor, as well as literally distributing luck to those who need it. Another way they could lend their aspect to others could come in the form of being able to send knowledge to others when they need it, perhaps tapping their head and transferring thoughts into their minds directly, or perhaps over a distance, being able to let others know their location if they're ever in trouble and need help.