Jellal Fernandes

Jellal is a young man whose most prominent features are his blue hair and a red tattoo under and above his right eye, which he has had since his childhood.

When he was young, Jellal was a very kind boy, and cared deeply for his friends. He was always cheerful and optimistic, despite his disposition as a slave. After a failed escape attempt, he readily accepted punishment in Erza's stead, and never once lost his faith in the thought of being free.  

Later, as he was manipulated by what he thought to be Zeref's ghost, he drastically changed. And then he harmed many people, created the new R-System and killed Simon. But at the end he was defited by natsu. And a huge Lacrima explosion occures.

Erza tries to defuse it by giving her life, but she was rescued by Natsu, Erza looks out at the sea and hears Jellal's voice, which says that she has become strong.Erza is surprised and claims it to be impossible; however, a slight smile can be seen on her face. It is revealed that Jellal, freed from the control of Zeref, is most likely the one who saved Erza and Natsu by fusing with the Etherion and guiding its Magic up in the sky.

Later his body was found by Oración Seis leader Brain, and the body was revived by Wendy but he lost all his memories except the name of Erza. Erza told him about what he did to his friends and repenting for his sins he tries to destroy himself. Erza persuades Jellal to nullify the Self-Destruction spell and to live.

Seven years later, after regaining his memories and having returned to his original personality, Jellal is now a calm, mature, intelligent, and kind individual. He has shown a cheerful side, as he often smiles when pleased, or when his friends are happy.

Grandpa Rob

Rob was a Fairy Tail Mage who was kidnapped and enslaved in the Tower of Heaven. There he met erza and became his friend, erza used to call him grandpa. Rob taught Erza about the true meaning of Magic. He died during the slaves' rebellion in an attempt to protect Erza from the Magical troops of Zeref's cult's attack. 

His Magical power at the time represented his life force, and his use of Magic to defend Erza resulted in his death. Erza saw Fairy Tail official guild mark in his back and seeing him die infront of her eye, Erza's Magical abilities were awakened.