Espionia

SHIP NAME HERE is the TYPE (HET/SLASH/FEMSLASH) ship between CHARACTER and CHARACTER from the SERIES NAME fandom.

Canon
Espionia is a fairly popular ship, although they will most likely ever meet. Sonia only appears in Sonic Underground.

Fanon
Espionia is among the most popular ships for Espio and Sonia, but mainly battles Knuxonia, Espade, Bartonia, and Espicole.

Fandom
Some fanfic has a somewhat romantic tension in it.

Trivia

 * Espio and Sonia are really good friends in fanfic