Shinsu Bubble

Shinsu Bubble is one of many types of Shinsu shape. The bubbles can be used for teleportation, defensive measure, or offensive attack.

Actually, there is no clear official explanation about this, but after seeing it's "repetitive use" on 3 characters, and also the similarity in their design, it can be predicted that shinsu bubbles is included in the shinsu shape category.

About
Shinsu is used to form one or many bubbles. The bubbles can be created, generated or produced by using '''hands, finger or mouth. '''

Vicente
The first user that was seen to use and utilize shinsu bubble is Vicente. He used it as transportation. He used it to travel with Wangnan. It can move very fast.

Ha Yuri Zahard
Princess Yuri Zahard first used shinsu bubble when she has to transport Baam and his friends and it can also protect them from the Boiling Acid, the dangerous liquid that was made by the Workshop. Yuri Zahard can generate shinsu bubbles from her index finger and mouth. Other than for transporting purposes, Yuri can use her shinsu bubble for offensive and defensive, indicating that she really has complete mastery over the shinsu bubbles.

Yu Han Sung
In the Hidden Floor, a young data version of Top Ranker Yu Han Sung was seen to use and form a single shinsu bubble to save Khun Aguero Agnis from Rain of Stones attack, a technique that belongs to Stone General.

Tinker Yolche
In the Second Floor Tinker Yolche was seen to produce several shinsu bubbles from her mouth and it strong enough to defend against Evankhell powerful sword attack.

Notes and Trivia

 * Some fans thought that Yuri's green shinsu bubble at the last station battlefield was produced from the Green April, but that's simply a misunderstanding because Yuri has used this shinsu bubble before when he rescued Baam after his fight with Hoaqin. The shinsu bubbles were created directly from her index finger, not from the Green April.
 * Evankhell mentioned the shinsu bubbles as petty tricks.