Been a while since I drew him and generally drawing a bird XD This is Yuden Silvius, an avian from the eagle species. You guys might remember from the previews pic that he had wings instead of arms and hands like in this pic.

https://www.weasyl.com/~symbolhero/submissions/1533795/wings-upon-the-sky

The avians species can adapt his themselves in the lands with arms and hands while the wings are just feathered sleeves. But when they accumulate Wind element Krestia, those sleeves react and turn into wings, making the avian to adapt in the skies. For Alice´s team, Yuden has good agility and speed with his knife that compensate his lack of strength, and also he´s up to assist his team for delivery missions from long distance.