Die for Our Ship: Rabid Sterk/Rorona shippers shows this tendencies towards Meruru for turning Rorona into a little girl in Atelier Meruru. After the game is out and the 'real' culprit is known, they attacked Astrid instead.
Fan-Preferred Couple: Rorona/Cory for Les Yay fans and Sterk/Rorona for straight fans. Both of which might be canon at this point.....at least until Atelier Meruru comes.
There are also some fans that ship Astrid/Sterk and Iksel/Rorona.
Fridge Logic: Putting a log, some mushrooms, and a jar of what looks like urine in a pot and stirring it for a day produces a fruit pie, pan and all.
Game-Breaker: Tera Bombs, especially the ones with good quality.
for playable characters example, Sterk and Gio. Justified as they're more experienced in combat than anyone else in the party.
Cory's "Call Servant" skill is another one.
Iksel. He's accessible early in the game, doesn't cost much to hire, has effective special attacks, and is one of the few healers in the game. And unlike Lionela, he has a high HP cap.
In Rorona Plus, Esty can count. Speed high enough to get two or even three strikes before the turn rotation finishes and a ranged normal attack (a rarity in this game compared to Meruru). Considering how good she is in Meruru, is it any surprise that her past self is just as powerful?
Moe: Rorona. Most of her popularity in game stems from this.
Uncanny Valley: The character models are a bit... off in the first version of the game. They look significantly better in Plus and the 3DS remake.