Espade

Espade is the het ship between Espio the Chameleon and Shade the Echidna from the Sonic the Hedgehog fandom.

Canon
As Espio does not appear in Sonic Chronicles: The Dark Brotherhood or its comic adaption, Shade's only appearances, the two have never met. Due to Ken Penders' lawsuit against SEGA and Shade's similarities to his character Julie-Su, it is unlikely Shade will appear again, meaning Espio and Shade will most likely never meet.

The closest mutual associate of the two is likely Knuckles the Echidna. Knuckles and Shade had a close friendship in Sonic Chronicles after she joined forces with Sonic and his friends. Knuckles was originally a member of the Chaotix, and as such, could team up with him in Knuckles' Chaotix.

Fanon
This ship is less popular for Shade and Espio compared to other ships like Espionia and Knuxade. It is an uncommon pairing, and does not have a tag on AO3 at the moment.

On DeviantArt, fanart of the pairing exists, but it is rare. A stamp of the pairing has been made by knightspeed199, who has made stamps for some Sonic pairings.

One similarity between the two is that both characters can be considered stealthy, as Espio is a ninja with the ability turn turn invisible and Shade is highly trained in the arts of stealth due to being a former Nocturnus Clan spy.

Fandom
DEVIANTART