Jerza

Jerza is a ship between Erza Scarlet and Jellal Fernandez from the Fairy Tail fandom.

Canon
Jellal and Erza met after both were enslaved and forced to construct the Tower of Heaven, made to revive a deceased person. Erza didn't remembered her surname, so Jellal suggested "Scarlet" because of her hair. After that, Jellal and Erza started to develop a strong bond. Jellal always protected and defended Erza from tortures, and Erza admired him for that.

One day, Erza and her friends tried to scape from the Tower of Heaven, but they whre trapped by the guards and Erza accused herself of being the one who led the escape. Jellal was going to asumme the guilty, but the guards assumed that it was Erza and she ended up being tortured, to the point that she lost one right eye. Jellal rescued Erza, but he ended up being captured. Eventually, Erza stagged a reovolt in order to save Jellal. Erza went to save Jellal while the rest of slaves where waiting for the two, but he was already (supposedly) possesed by Zeref, who twisted his kind and righteous personality to a violoent and evil one. Jellal afirmmed that the only way to research freedom was completing the tower to revive Zeref, and Erza refused to help him. Jellal exiled Erza from the tower and told her to keep the Tower of Heaven as a secret from the government, threatening to kill everyone in the tower if she did otherwise.

Fanon
Jerza is one of the most popular ships within the Fairy Tail fandom, alongside NaLu, Gruvia and Gajevy. It is also the most popular ship for both characters, though it rivals ships like Natza and Grayza.