Yukio Hans Vorarlberna

is a member of the mysterious organization, Xcution.

Appearance
Yukio is a young boy with spiky, blonde hair with bangs that are usually covering his green eyes. He wears dark-colored clothes, which includes a black cap, a black 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. Tsukishima demands to know why he didn't lock him away instead of Ichigo if he didn't want him to interfere with Ichigo's growth. Yukio brushes off the taunt and replies that he doesn't have enough memory left to save him. He informs Tsukishima that they are now attracting a crowd and that couldn't be good for either of them and they needed to get out of there. Riruka holds the "Love Gun" to Tsukishima's back and Yukio tell him they'll be leaving with Ichigo. Yukio Loads Ichigo and releases him in their second headquarters. There he confirms that it is his money that manages the upkeep of their hideouts. He goes to help Giriko but Kūgo requests that he stays to help train Ichigo because his abilities completely seal Reiatsu. He resists at first but agrees to do so in the end so Kūgo can fight Ichigo.

After plugging his console into the wall, Yukio loads Ichigo and Kūgo into his game. Ichigo realizes that this is what happened to him on the rooftops and Kūgo confirms this and explains Yukio's ability. After teasing Ichigo, Kūgo brings out his Fullbring sword and says it would be great if they had rules like a video game and asks Yukio to give them HP. Yukio responds that he can do it instantly and if Kūgo would like it to reflect real life. Kūgo asks for six HP each and six crosses appear above their heads. Kūgo asks if Ichigo needs a tutorial but he says he has it and the two then charge at each other when the timer says go. Later, Yukio lets Orihime into the game. Sado asks him to create a separate room with a specialized training environment so that he can train as well. Yukio later looks up from his seat to see that it is two minutes to midnight and presses a button to fast-forward the training.

Yukio allows Riruka to enter his Fullbring with some food. She asks him to create a table and chairs for her and Orihime, urging him to do so quickly. He refuses, but when Orihime politely asks for a chair, he creates a table and two chairs for them. Riruka begins to give out, but Yukio tells her that she should learn to ask nicely like Orihime did. As Kūgo's training of Ichigo intensifies, Orihime tries to intervene, Yukio traps her inside a cage at Kūgo's behest. He tells Orihime that her voice cannot be heard from outside the cage and that it cannot be broken due to the game's rules. He then notices that he cannot hear her either.

As Ichigo, Orihime and Sado leave, Yukio greets them and welcomes them back. He congratulates Ichigo and says it only took him forever. He says Ichigo took so long that he thought his batteries were going to run out. Ichigo thanks him and Yukio then tells Ichigo to go home to his sisters as he did not call and they are probably worried. Ichigo becomes panicked and wonders how long he was in there. Yukio points to the clock and says he has only been in there for 90 minutes since he used the fast forward option. He tells Ichigo to go and says his sisters are likely still awake, worried sick about him.

After Kūgo takes Ichigo to a secret hideout to talk, Yukio interrupts them, saying their conversation is disturbing. Ichigo and Kūgo are shocked to see him and Kūgo asks how he found them, prompting Yukio to show his Fullbring's tracker and say that they always do that. Yukio calls Kūgo screwed up and tells him to come along and they will go home. He tells Kūgo that no one is angry with him and that they will have him back to normal in no time. He then leads Kūgo and Ichigo to a mansion in the woods. When Tsukishima invites them inside, Ichigo is wary of there being traps in the mansion. Tsukishima points out that if he was going to place any traps, he would have done so in the forest. Yukio then hurries them on.

Fullbring

 * This power is activated by his handheld video game console. Its power can be used to seal people away in a tessellated box-like structure. While sealed, the person's Reiatsu is completely cut off from the outside world. This process is referred to as "Saving". Conversely, releasing people that have been "Saved" is referred to as "Loading". The people inside are locked in another dimension and Yukio can then control the game from the game screen. This power is useful when training, as he can use the video game world to give combatants HP, simulating real life battles while eliminating the risk of death and altering environmental conditions such as the weather, gravity and time progression, as well as different types of terrain. He can create separate areas within the video game world, allowing multiple people to train without affecting each other. Yukio can only use this so long as his video game has battery power. Yukio also has the ability to put a tracker on other people to help him find that person.