I believe there is a Bug with Agatha's Figurine.
If you accept the Candied Pair Quest; then the figurine doesn't show up and if you accept Agatha's request first, then it does.
I've also had to play Metal Gear Solid trying to evade Julis looking to force the player to follow them while trying to look for that figurine to figure out where it exactly is, checking the corners of the entire house/place.