Lillet is, methinks, 16 during the game.
Oh, blast, I forgot to update the Grimoires-Lillet-Knows-List.
Fairy Ring 3
Wicca 4
Hades Gate 2
Hell Gate 3
Gehenna 1
Laboratory 2
Engrave 1
The reason Lillet has the Laboratory and the Engrave is because later in the day Chartreuse will give them to her. The Laboratory is at level two because Amoretta taught Lillet how to summon Homunculi.
A couple of clarifications about the events of Day 3 - Continued and Day 4:
1) The reason Opalneria decided to wreck the lab was because she'd gone to see Chartreuse precisely when Lillet came in with Amoretta...and she saw Chartreuse 'hugging' (supporting) Amoretta as he led her to the tank room. Meaning she completely misunderstood and got jealous like an idiot, then threw a hissy fit and decided she'd destroy Chartreuse's lab.
2) In Day 4, Chartreuse has gone to look for Opalneria to give her a piece of his mind about that stunt she pulled. It's one thing to bother his research, but this time it had serious repercussions on a student.
3) Lillet
will remain in bed for the remainder of Day 4 because Amoretta is not going to allow her to exert herself. This also gives Chartreuse a chance to give her proper Alchemy lessons, which means that on Day 5 she probably will be more advanced than where I left her off.
EDIT: In case nobody noticed, I sent 'ambiguity' to the lowest layers of the underworld with Lillet and Amoretta.

