Being as annoying as possible?
Yuuuuuuuuuuup.
In the next episode, I'm hoping they both fall into some hole and are never seen again.
She's not even annoying, she is just straight up boring. I love cute but psycho characters (that's part of why I like Nonon) but Nui? She is so generic and even worse, she's nothing more than a literal plot tool as her only reason for being involved in the plot is because she was literally, plain and simple, bored.
Also semi-related, but I wonder, who is the one that's going to beat Nui?
Ryuuko is the obvious answer but part of me really wants to see Makotaro/Mako be the one to beat her. Besides the fight being potentially more hilarious I feel like after all of that talk about Ryuuko being out for more than revenge, it feels like it'd be a cop out if she was the one to beat Nui after all of this time.
Also after all of the attention she's been giving Ryuuko (and most possibly Satsuki in the next few episodes), it feels like it'd be so satisfying that she gets the stuffing beat out of her by this complete nobody that doesn't even register to her. Thematically it would be her falling into the trap (yet again) of putting her attention too closely on something (the Scissor Blades/the Kamui's) only to fail and not see the whole picture (Senketsu/Mako).
Also Nonon would be a choice, if only because I want to see Nonon go all bullet hell on Nui's ass.