Tenshi, aka Tenko.
I'll be completely honest; I f---ing hate Tenshi. She's the one Touhou character I loathe. More so with her personality (on the contrary, I love
her design). Being a celestial, she resides in heaven. But she finds paradise monotonous, so what does she do? Causes an earthquake, completely leveling Reimu's shrine.Out of sheer boredom.
And she was plotting to cause an even GREATER tremor. Then when she's confronted as the final boss of Scarlet Weather Rhapsody, she gets cocky and taunts you (which, for some reason, led fans to believe that she was a masochist...whut).
Now the various characters that cause incidents within the series usually have an understandable reason for doing so (more or less). Tenshi, on the other hand, did this for kicks.
Which is why I dislike her.