Kikyou is generally placid and very few things can irk her, as she ignores insignificant nuisances.
However, come between her and her lover, her and her child or both..and you will see how fast her fangs will flash. If you think her inhuman s/o is terrible, consider a very protective, strong, no nonsense kik tearing you apart for pulling this shit. Her tongue is as sharp as as the most fearsome blade-so violence is not always necessary unless it has to be.
For a person to have earned this level of wrath..can have it dulled if she realizes just how pathetic and sad their existence is. The rage would still be there..but so would pity. Or you can be pitied and still receive the full blast of her anger. It depends.
Point is: her snarl and her bite can be worse than her s/o.