Aura Fernandes is Jellal's younger sister and Ice Dragonslayer. Her dragon was named Aisu, but she disappeared along with the other dragons in the year X777. She was separated from Jellal when he was taken to the Tower of Heaven. She went into a sense of fear and desperation, so she traveled all over Fiore looking for her older brother and Aisu, ending her journey at Fairy Tail. She became the resident Ice Dragonslayer, helping out Team Natsu on whatever mission they had to do.
Her heart shattered when Team Natsu went to the Tower of Heaven, and her brother was there, as the enemy. He didn't remember her, not one bit. Her heart was mended when her brother showed up during the fight with the Oraçion Seis and he wasn't the enemy. She bailed him out of the Magic Council's jail, and they lived together in her cottage peacefully until one day…
Jellal woke up on that day with an uneasy feeling. He felt that something was wrong with Aura, so he went to her room. He knocked on the door. "Hey Aura? Are you okay?" He asked, fearing something really was wrong.
"Yeah, I'm fine… Why?" She replied, popping her head into the doorway, her cerulean hair un-brushed and scruffy. Jellal shrugged.
"Brotherly senses were acting up. No big deal." He explained, leaving to make breakfast. About half an hour later, breakfast was finished, and Aura wasn't running to the table. "Hey, Aura! Breakfast!" He called down the hall. Aura came out of her room wearing a sweater. "Why are you wearing a sweater?" Jellal asked out of curiosity.
"My room was a bit chilly. That's all. So what are we eating?" She answered, looking over her brother's shoulder to the kitchen table behind him. "Mmm… fruit salad." Aura grabbed her bowl and sat down at her usual seat. Jellal knew something was wrong. 'Aura put on a sweater? She never minds the cold. She's an Ice Dragonslayer! Something is definitely wrong with her.' Jellal thought. Aura finished her fruit, put the bowl in the sink, and went back to her room.
Three hours later, Jellal's brotherly senses were going wild, so he went to check on his little sister. "Aura, are you okay?" he asked, knocking on the door once more. This time he didn't receive an answer. He opened the door. Aura stood right at the door, looking really pale and weak. Her eyes closed and she collapsed into her brother's arms. "Aura!" Jellal remembered that Fairy Tail had a Mage that knew healing magic, but he couldn't remember her name. "Wendy!" He realized, running all the way to the guildhall, Aura unconscious in his arms.