Just before launch, I was very excited, because I saw Archfey was one of the pacts available for the Warlock.
During early access, I had a good time with the Fiend pact and the Imp... but having Archfey and a sprite seemed like a super-awesome thing to have. I remember having a great time with my Pixie familiar back in the first Neverwinter Nights game (with it tossing out unintelligible sylvan words and being probably too good at unlocking things... but it was still really cool).
In the last Panel from Hell, we had an unveiling of a portion of Act 2, and - to not get too much in spoilers - I got my confirmation that a pixie model was in the game. I whooped!
It was flying, it had an animation rig, it actually looked more like a sprite than a pixie, it looked like it might be an option for Pact of the Chain if you're in an archfey pact.
Alas, this does not appear to be the case.
Might I beg for the inclusion of the sprite?
It looks like you have something close to similar to its Invisibility capability with the Imp.
Its melee attack is kind of minimal. So is its ranged, except for its chance to poison or put to sleep depending on the DC.
Heartsight which is used to detect alignment on touch with a Charisma saving throw is the hardest to translate, though a possible adaptation could be to grant Detect Thought on Short Rest.
(to be honest, I don't keenly care for the degree of statistical accuracy or if its a sprite/pixie/something original so long as I can get my faerie sidekick.)
Thank you for your consideration!