Wow, did I just say that?
Lydia is a young woman with a slim build, light skin tone, long bright purple hair that is tied up into a ponytail that hangs directly off the left side of her head by a large braid with two long strands that flow freely over her face, and dark purple eyes with a yellow shine to them.
Her attire consists of the standardized Tir Nan Og College uniform, which itself is made up of a sleeveless magenta vest with mint-green trim and a matching mint-green pendant that keeps a small cape bound to it, long pale-pink sleeves disconnected from the vest with mint-green trim, a pink skirt with a pair of layered magenta stripes at the very bottom, and pale pink shoes that stay bound to her feet thanks to thin vine-like straps that wrap around much of her lower legs.
Lydia's wings, which appear as a simple pair of lilac-colored wings similar to that of a butterfly's, constantly remain present behind her.
At first, Lydia appears to be a prideful bully of a girl when she and her friend, Nadine, react to another classmate of theirs getting praise for a simple levitation spell with anger and frustration, leading the both of them into displaying illusory spells that they had picked up to one-up her and prove themselves to be more skillful fairies while being fully aware of the illusion magic ban Acting Queen Nebula had placed over the school. However, this does not mean she and Nadine are malicious people, as the two of them were simply acting out of hotheaded teenage pride and, when faced with the truth that what they have been doing is wrong, will try to right them. This also shows that Lydia is a brave spirit, as she even assists the Winx and Nebula during their battle with Yllidith, aware of how fearsome the wizard is from witnessing his illusions firsthand.
She also appears to be a very diligent student as she was able to learn how to create magical doubles and mimic another person's appearance to the point of near-perfection after many lessons with a mysterious professor residing in the basement of the school.
Sometime during the school year, she and Nadine had somehow wandered into the basement of Tir Nan Og College. As the two fairies tried to look for a way back to the main levels, they suddenly heard a man's voice speaking directly into their minds. This man insisted that he was but a mere professor who lived within the school's basement and began teaching Lydia and Nadine how to cast illusion magic, mainly by having them focus their own magic on a broken pillar with a strange seal on it.
After finding a way out of the basement, Lydia and Nadine began to visit this mysterious professor every so often to hone their new skills, all while continuing to channel their magic into the pillar with the strange seal, gradually breaking it with each lesson.
The most notable aspect of Lydia's powers is that she is capable of using illusory magic, and seems to have a good grasp on creating magical duplicates of herself that can move and talk independently of herself. She even uses this ability in the very beginning of The First Fairy Hunter to intimidate one of her classmates while also showing off how much more capable a magic user she is in front of Morgana and the Winx. Later into the issue, Lydia shows that she is capable of creating magical duplicates of other beings as, during the climactic battle against Yllidith, she joins her powers with her friend Nadine to create duplicates of Morgana, Diana, Aurora and Sibylla that proved to be so identical to the real deals that even Yllidith, a master in creating illusions and the one who taught her everything she knows, was caught off-guard by them and could not immediately recognize them as fakes.
Lydia also knows basic, first-level spells that all fairies can use, such as telekinesis, transmuting objects, and fixing minor messes.