* CompleteMonster: Tadaomi. So much that [[spoiler: it's only at the end of the series and in his ''next life'' that he even starts showing something similar to human compassion and feelings.]]
* GameBreaker: Tadaomi, too. He got his powers [[CreepyChild when he was a pre-teen boy]] and soon learned to use them efficiently, thus he is in much more control of them than Mio and Rei/Shou.
* MoralEventHorizon: [[spoiler:Tadaomi killing Shou/Rei's father]] is only one of these. Actually, [[spoiler: he]] pulled something even worse earlier: [[spoiler: ''he'' is the one who killed the Mizumori parents (''his own aunt and uncle'', who by all accounts were really sweet people), in hopes to both awaken Mio's powers and have her forced to live with him.]]
** And [[spoiler: how he destroys ''a plane'' with his powers solely to murder Shou. Killing everyone ''but'' him instead.. which includes the recently broken Miyabi.]]
* NightmareFuel: [[spoiler: How Tadaomi murders the Narumiya patriarch. Via ''setting him on fire''. '''On page'''.]]
* TheWoobie: Mio, oh Mio.
** And [[spoiler: Miyabi]], too.