>>718967156
Aria has the Succubus and Lilith hot tub room with the rubber ducky, the room with a bunch of Ripper enemies hiding in a box, the room with a random Killer Fish lying on the floor, etc. Also lots of humorous interactions, such as making the Red Minotaurs drop their axe.

SotN is by no means the only Igavania with these sorts of quirky details. Aria of Sorrow and every DSvania has tons of these.