These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nightmare Fuel: Your second visit to Gren and Erd. And then... You carry around what's LEFT of Semolina as a Cosmic Keystone. And the final dungeon. Just...poor Pirate Otters.
To elaborate on that "second visit to Erd". As it turns out, all robots, Mokka included, use gummy batteries. What are these batteries made of? Humans that turned into gummies while trying to make the Cosmic Keystone gummies. It's also said that when they run out of these former humans and other things to make their power cells with, they will all forcibly have their programming over run to attack every civilization in the solar system for more. Yes, including Mokka. That not enough? Also during your second visit to Erd, you can go up to the top of Kahve Ruins after recharging Mokka's battery. Know what you'll find? Applepie, or as she's better known, Gummy Girl. This is one of the first humans to be turned into a gummy. However, she, unlike the others, retained her sentience. So ever since she was transformed- around or over 800 years ago, mind you- she has sat in agonizing torment at the top of the tower, waiting for someone to give her the sweet embrace of death.
The Gummy Girl on Erd. Frequently inflicts curse to keep you from healing, two out of three of her skills hit the entire party which is the main reason WHY she constantly inflicts curse, and to top if off she takes a ton of punishment before going down.
Villain Decay: Master Chard's first boss fight is probably the most formidable in the game. The second time is almost as bad...if you didn't learn anything from the first time you fought him. The third time...is basically a Curb-Stomp Battle.
Waggle: The button controls for Starsign are slower and at times nonexistent compared to the touchscreen controls. Now consider how most RPGs lack touchscreen controls altogether...
The Woobie: Definitely Semolina, and a number of others too.