"I suppose delicious Izaya trap was too much to hope for…"
Shizuo stopped on his tracks.
"That's it! That's what I need…an Izaya trap! I must trap the louse. Thanks, that was a great idea! I'll buy you another juice."
Instead of this offer Erika would rather he shared an indirect kiss with Izaya followed by some failing and blushing, you could always do with more blushing, but there was definitely potential here.
"Let me help with that!"
Shizuo became thoughtful for a while.
"Izaya is smart…so I guess if you know how to trap him then I'll take you on that."
Erika was, without a doubt, on it.
"Leave it to me, Shizuo! I'll contact you later!"
She hurried back home and hopped to the computer as per usual. Time to upload her wallpaper to something currently airing but first and foremost she had an email to compose. Normally Erika would opt for a nice traditional love letter, discreetly tucked into a locker and followed by the anguished declaration, bonus points for sunset. Extra bonus points if a rival eavesdrops on the whole thing. But not all things went her way and she could never mimic Shizuo's calligraphy. Shounen heroes had problems to overcome and Erika too found solutions with considerably less bitching, truth be said, and without calling out names as a form of upgrading skills and there was no glowing involved nor standing still in front of an opponent to lecture him at length.
Erika thought aloud as she typed.
'Izaya-kun, I have something to tell you. Something important that has been burdening my heart all these years. This heart of mine that yearns for you and that feels the red thread of destiny tying us together. My love for you is written in the stars.'
She reached for a pocky and thoughtfully chewed on the chocolate goodness. So far she had pinned Izaya as the 'snarky narcissistic borderline troll' kind that needs be was gayer than all of the stuff published by June multiplied by every Be Boy magazine issue then upped to the power of over a million. To reel him in a bait was necessary. Like apples worked on both Ryuk and Horo (and Erika had a feeling that there might something to the connection between the two, randomness not withstanding).
"I only have to feed his god complex, then!"
Erika deleted the text and started afresh.
'Izaya-kun, I know that I can't defeat you. You have outwitted me completely. So I'd like us to stop fighting. I'm not good with words but there is something I must tell you in person. Do meet me at the following address this Saturday at 10 pm.'
She almost signed 'Kira' but refrained at the last moment. Upon rereading the missive she wanted to add much more. Things about throbbing chests, bubbling feelings, shoujo roses spontaneously blooming and the whole lot. But she suspected that Izaya would never buy it. Too much OOC was bad. All of Erika's cherished ships were canon, it just so happened that the general public did not quite see it.
Erika smiled happily. Some tweaking with email addresses later she sent the mail, niftily identified as Shizuo's.

Izaya walked into the empty building with his typical strut. This was going to be a good night.
"Shizu-chan! Oh Shi-zu-chan! You here already? I knew you'd come to your senses and realize how amazing I am. So come out wherever you are!"
He noticed that something was not quite right a fraction of a heartbeat too late. Erika jumped out of nowhere and tased him. Izaya fell to the floor before he could quite get to his pet switchblade and soon enough his body was too numb for him to even move. She laughed her best oujou-sama laughter.
"Just as planned!"
Izaya blinked. He was greatly confused and getting more scared by the second. Shizuo he could handle but Erika was completely off her rocker. He tried to speak but it did not work.
"Your charm point is the foe-yay/ho-yay element. I'm only here to help out. I'm hoping for a sweet confession but first, you know how it goes…Izaya-kun. Can't have that without rape first. Because rape means love!"
And with that she produced a suspicious vial and poured it on Izaya who by now had completely reconsidered his expectations for the night.