She just likes solving puzzles

Thunder. Lightning. Volcanic eruptions, it seemed, from every visible source of flame. The Auld King's Throne, once gilded and jeweled, now decked with skulls and spinal columns, spun to face outwards at this new intruder. And the Grand Duke of the Infernal bellowed forth, "And so another foolish being dares challenge the might of--" his vacant eyesockets squinted at whoever it was on the red-stained carpet. He expected a party, led perhaps by a hero. Standing there was only one person: a short-haired girl in a billowing robe, her eyepieces glinting from the light of the volcandles. "Why is it you again?" demanded the Grand Duke.

"I'd heard you'd given the place an overhaul, and I wanted to see how you'd progressed since last year," said Emm, the Enigma Eraser, taking a spiral-bound tome from somewhere in her voluminous robe. "I took some notes, if you're open to feedback. Some of the stuff you're doing with the Dining Hall in particular could stand to greatly affect the dungeon-solving meta."

"The META?!" boomed the Grand Duke. "It's meant to be difficult! Adventurers aren't supposed to reach this room!"

"I suppose you could stand to hear this, then." She whipped the tome open, skipping over several pages about temples of all manner of elements from Water to Forest to Elemental Evil, until she reached her section for Castles (Infernal). "Well, on top of the key to the Throne Room being hidden behind an unmarked secret..."

"Obviously it's not the only key, I keep a copy on my person at all times, so that I may move about freely."

"The jeweled Eyes that are supposed to slot into the Angel Emblem are getting rather loose from repeated insertion and removal..."

The Duke unleashed a shadowy sigh. "If you'd just quit pounding on them to get them to fit into the slots, maybe they wouldn't be so bad!"

"I did like the changes you'd made to the Antechamber Mural; the poem you'd written for it last year was a bit confusing and didn't make a lot of sense, but spreading the mural pieces into the basement cells actually gave me a reason to go down there this time, and I really liked how you spiced it up with your use of iambic pentameter."

"...You did? Oh. My thanks." If the Grand Duke still had flesh upon his face, its cheeks would be turning red.

"And the play on words about 'a tack, a tack!' in the Dressing Room was truly inspired."

"One does have quite a lot of time on one's hands to come up with it." He twiddled his bony fingers.

"But," Emm qualified with a single finger held aloft, "you might notice I'm here by myself."

"Indeed you are. Has your party forsaken you?"

"No, in fact, this was a solo attempt. For being so insistent that you're expecting a party of adventurers, don't you think your puzzles ought to require more than one person?"

"The thought had crossed my mind. But that's not particularly inclusive, is it? It would truly be a shame if my humble abode simply could not be traversed by one's lonesome."

"I mean, that's completely fair. I did hear about there being plenty more lone-wolf adventurers these days."

"Did you at least refrain from beheading the Ghoul Guards this time?"

"I thought I told you last year, that's not normally my style, I was just trying to figure out if they were connected to one of the door locks."

"I ask you, what idiot property owner would lock a door using their own minion as the key? I'd have to kill them myself just to leave."