User blog comment:Derax-Pagani/Fairy Tail Chapter 493 White Dragneel Review/@comment-4829046-20160711125947/@comment-7418318-20160712084049

@Damon: And how would Hisui annoy her? By existing? By being afraid of her?

Irene's face wasn't of someone annoyed. When we first see her in chapter 491 after wiping the floor with Arcadios and his subordinates, she looked mildly amused.

And the moment she laid eyes on Hisui she looked very happy in a cruel way. "Oh look, a helples girl to torment. This turns out to be a good day. First I get to show off against Acnologia, then help his majesty with his plan and now I get a little treat for myself." is what comes to my mind when seeing that face, not "I'm so annoying I'm going to torment them."

... and there is THIS page.