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.
YMMV: Robot Alchemic Drive
Les Yay: Nanao is a possible love interest for either of the male protagonists. Her dialogue changes very little if you're using the female character, Yui.
Narm: The English voice acting is laughable but Nanao's line "A robot killed grandma..." takes the cake.
The Scrappy: Nanao is generally not well-liked among the game's fans: the combination of her whiny attitude, constant need for saving, and God-awful voice acting has won her very few fans.