Yukio Hans Vorarlberna

is a member of the mysterious organization, Xcution.

Appearance
Yukio is a young man with spiky hair with bangs that are usually covering his eyes. He wears dark-colored clothes, which includes a cap, a coat, dark-colored pants, and dark-colored boots.

Personality
Yukio is calm and quiet, usually not speaking unless something catches his attention. He seems fond of playing video games. He is slightly annoyed whenever Riruka kicks open a door, as he can see up her skirt whenever she does so.

The Lost Substitute Shinigami arc
Yukio is present along with Giriko Kutsuzawa and Jackie Tristan when Kūgo Ginjō brings Ichigo Kurosaki to the Xcution headquarters for him to join them. After Kūgo explains to Ichigo who they are, and after Riruka Dokugamine brings in Yasutora Sado, Ichigo agrees to help the Xcution with their goals, which relieves Yukio, Giriko, and Jackie.

Ichigo later returns to the Xcution for training while Yukio is playing with a handheld video game. When Riruka enters with a doll house, Yukio tells her it is about time that she stopped opening doors with her foot, as he can see her underwear every time she does so and comments that he does not want to see that. Riruka tries to argue with Yukio, but he does not hear her speak due to wearing headphones while playing his video game. He pulls out one of his headphones and asks Riruka to repeat what she said, but Jackie stops her from speaking and asks her to teach Ichigo about the Doll House. Later he informs Kūgo that the phone is ringing, signalling the return of Ichigo for answers.

When Ichigo is placed inside a fish tank to fight Jackie, an uninterested Riruka leaves, saying that she does not care about today's training and to come for when it is done. Yukio asks Kūgo if he can say what he is thinking, but he replies not to. Yukio says it anyway, stating that he hates that about Riruka. He then asks where Giriko is, claiming that he does not really care.

Later, when Tsukishima goes to attack Ichigo after the former's intrusion into Xcution's headquarters, Yukio steps in and uses his Fullbring to remove Ichigo from the battle.

Fullbring
Invaders Must Die: This power is activated by his handheld video game. Its power can be used to seal people away in a tessellated box-like structure.