This is the original Sashimi Akali
https://i.ytimg.com/vi/Y5_fIRISM2Y/hqdefault.jpg (pre Akali rework)
Then it was updated to this
https://www.mobafire.com/images/champion/skins/landscape/akali-sashimi.jpg (Akali rework)
Now it would become this
https://vignette.wikia.nocookie.net/leagueoflegends/images/e/ea/Akali_SashimiSkin.jpg/revision/latest?cb=20190729171817 (Pantheon rework)
Notice in each version Akali's expression is different. The smile was only introduced during the first edit that came with Akali rework, as in the original version Akali looks rather alerted for some reason.
The evolution of Sashimi Akali, I guess.
I do think the 3rd one is okay. Since Butcher Olaf has always looked like he just brought the freshly chopped T-bone onto the table and Akali quickly gives it a quick glance, where the original made the glance a bit too intense for some reason, the first edit made it seem like Akali was too absorbed in her stuff, while the final edit does a good job of illustrating the initial intended action of the scene.
Though for some reason in the newest version the lighting on Akali seems off, it's weirdly dark and she's in fact standing in a shadow even when the light is just above her. Hopefully they'd fix that before going live.