Board Thread:Questions and Answers/@comment-27944587-20160809040636/@comment-26537436-20170519142853

These are vampires we are talking about - they are not humans but supernatural creatures. Like how one would deal with a supernatural creature in real life. Normal humans cannot fight back creatures like those unless you can throw off magic spells/wield a stake without much effort. That is off topic, I know, but it relates.

Yui is just doing what a sane person would do. She would not want to die while being bitten. If she showed more resistance, her head would have been ripped off.