* ''UchuuNoStellvia'' takes place in a world where war is such a distant memory that most of the teenage main characters don't even know what it is. This makes it all the more tragic when [[spoiler: a confrontation with alien spacecraft turns suddenly, devastatingly deadly.]] The slow, haunting rendition of the opening theme playing in the background — a more upbeat version of which previously played in-show during [[CrowningMomentOfAwesome moments of triumph]] — doesn't help. Neither does finding out later that [[spoiler: the aliens were actually trying to help humanity, and only killed in self-defense. If the Foundations hadn't fired first, no one would have died.]]
* The entire last episode, but especially when [[spoiler: Stellvia goes into the fracture.]]