Akali was the only energy-based champion to have any associated cost on their ultimate (one Essence of Shadow).
Shadow Dance was going to be a skillshot but became single-targeted instead.
Akali used to gain the 'Law of Inverse Ninja Strength' cosmetic Easter egg debuff ("This unit is a flippin' ninja!" - "Ninjas are more effective when they work alone. For every Ninja on your team beyond yourself, you lose 1 health.") when he, Kennen, Shen, and/or Zed found themselves on the same team. It was removed in V3.14 for unknown reasons.
Akali, the Rogue Assassin
Akali is the second champion, after Yasuo, to have an emote that will orient itself the same (facing towards the camera, no matter what direction Akali was facing.
However, she is the first to always reposition herself to face the camera when using the emotes, and has this function on both her dance and joke emotes.
When she accompanied Shen to track down Jhin during Golden Excellence, she was 'the same age as he when he caught him the first time'.
Akali, the Fist of Shadow
"So many noobs... will matchmaking ever find true balance?" references (albeit in a rather tongue-in-cheek fashion) the criticism towards the matchmaking system, often matching up teams of wildly varying levels, causing lower-leveled players to be stomped on by higher-level ones.