Ayeka Jurai of Tenchi Muyo

The woman in the purple wig and blue dress is likely cosplaying as Ayeka Jurai from Tenchi Muyo, a Japanese anime series. The costume consists of a long-sleeved blue dress with a red sash around her waist and a matching headband. Her hair is styled in two long braids that fall down her back, and she wears a purple wig on top of it. The background of the image is blurred, but it appears to be a convention or event where cosplayers gather to take photos and showcase their costumes. The overall impression of the image is one of creativity and self-expression, as the woman has put together an elaborate costume that showcases her love for the character.