Why does Shiina always say "how shallow-minded"?


She usually says the phrase "how shallow-minded" (あさはかなり,asahaka nari). Is the
fact that [she came from the past (a.e Feudal Japan) and was born in Ancient
Japan](http://angelbeats.wikia.com/wiki/Shiina#Background) has something to do
with it?

![enter image description here](https://i.stack.imgur.com/tMEGB.jpg)




As stated in the wiki page you linked to, it's most likely because she's from
an earlier era.

Also, being a trained assassin, she most likely views the actions of other
characters as childish and foolish, so she just gives her honest opinion on
the matter.

