Deirdre was hatched along with her brother, Brennan, to a kind female marowak named Cwen, and her mate—a quiet, serious looking marowak named Asa. The family of four lived quite happily in the deep woods, and everyday Brennan and Deirdre went out into the woods and explored the dilapidated buildings scattered throughout. There, they found lots of little items of interest, though never all at once. Sometimes they would have to search hard, looking under old, rotting chairs, couches, and sinks to find the shiny, colorful objects that truly drew their attention. They were each other's best friends, as there weren't many other pokemon around that were in the habit of leaving the trees high up above. The duo was still quite young when their mother told them that they weren't meant to live in the forests. That something had happened, and that she and Asa had decided it would be best to move down from the mountains to hatch their eggs in the safety of the forests. This confused Brennan and Deirdre, but they didn't question the logic of their wise parents, and anyways, they enjoyed the beauty and security of the forest, along with the houses, and weren't about to argue about moving.
It wasn't long, a about a year or so, before they had searched all the buildings in the surrounding area. It was around this time that the two started thinking about convincing their parents that maybe moving back into the mountains wouldn't be such a bad idea—perhaps there would be new houses and items there. Sadly, they never got the chance. Unbeknownst to Brennan and Deirdre, their parents were not the only ones who'd become uneasy and decided that moving might be a good idea. When the scars in the sky became more frequent, other pokemon began getting nervous like Asa and Cwen, and started moving to newer locations, including the woods. These pokemon arrived scared and unsure of the area they were starting their new lives in, and it was a nervous, angry mother mightyena who killed Asa and Cwen, along with the help of her mate, after Asa had hit a young poochyena in self defense. By the time Deirdre and Brennan had arrived, their parents were dead. The siblings took the new skulls, sobbing, and placed them atop their heads.
After that, the duo thought that perhaps moving to the mountains would be safer than sticking around and waiting to get chomped to death by the beasts flowing into the forest. When they exited the woods, they were astounded to look up at the sky—something that had been for the most part hidden behind the foliage of the trees up until then. The scars fascinated them; even young ones who'd never properly viewed the sky before could tell the rips were sinister. Deirdre shivered, still crying for her dead parents, and the sound sent a hollow echo of noise up into the sky.
The mountain they ultimately decided their parents had ventured down from was actually quite close, as their parents evidently hadn't wanted to travel far with two eggs. They struggled to the top, stopping only to sob and comfort each other now and then. It was two whole days of traveling without food (and only a small bit of water that they'd managed to find) before they passed out. Quite luckily, it was right in front of the den of a family of cleffable. The mother dragged them in, force feeding the two and fussing over them as the three children—one clefairy and two cleffa—stood watching. When the father returned (a large, jolly cleffable named Bidzill) he listened to their story and after half a moment's consideration, welcomed the two into his house as family.
While they considered themselves truly welcomed, Deirdre and Brannan kept their distance from the family at first. They completed any chores Ady (the mother) requested of them, but for the most part, they spent their days sparring and training, hoping to avoid ever having happen to them what took the lives of their dear parents. After about two months of straight training, it seemed that of the two, Brannan was definitely the better of them in battle. Nevertheless, Deirdre was quite skilled as well, and worked hard to keep up with her brother. During the time, the two also tried their hardest to stay strong and positive—Brannan especially. He told Deirdre jokes to cheer her up, and did his best to do nice things for her and remind her of how happy their parents would be to see them alive and well and thriving on the mountainside. Deirdre was sensitive though, and while Brannan was better at hiding his emotions and focusing on training, she would oftentimes find herself angry and sad about her parents leaving them.
After these two months, the two began to come out of their shells—there was only so much training a young pokemon could do before the tears were fought out. Brannan found comfort in talking to Bidzill about the mountains, and about different moves that could be used in battle. Deirdre found comfort in talking to and helping Ady around the house, and playing with the children—the clefairy, Sener, and the two cleffa, Kaegen and Kaida. She would oftentimes show them parts of her necklace, telling the children the tales of how they were discovered and captured by Brennan and herself in the forest that had been their home. They became very fond of her, and loved her like their own sister.
But all was not well, and when Giratina created the tear that manifested the dark tower, the news spread quickly that an army was being erected to battle evil forces. Bidzill, not one to sit and let disaster come to him and his family, listened carefully before deciding that it was his time to help preserve good. Brannan insisted on coming as well, and while Bidzill didn't argue, Deirdre fought with him tooth and nail about it. Before he left, Brannan gave his sister his prized possession—a bandanna they'd found while exploring the houses of the forests, which had been preserved for many many years within a plastic container of some sort. It was one of the few pieces of fabric the two had ever seen, and while faded, it was still something amazing to them. When he handed it to her, Deirdre broke down sobbing, and they stood hugging for a long time before he left, determined to keep his sister and his new family safe.
Deirdre hasn't seen Brennan since that time. It feels a part of her has been ripped away, and everyone around her has noticed a change in her attitude. She is more moody, spends more time alone, and can often be heard crying out on the hills she and Brennan trained on. Most often she can be found either training passionately, crying alone somewhere on the mountains, or with Sener, Kaegan, and Kaida, whom she can't stand to be mean to even in her worst of moods.