Shinsu Bubble

Shinsoo Bubble is one of many types of Shinsoo 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 shinsoo bubbles is included in the shinsoo shape category.

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

Ha Yuri Zahard
The first user that was seen to use and utilize shinsoo bubbles are Princess Yuri Zahard. She used it to teleport Baam and his friends and protect them from Boiling Acid, the dangerous liquid that was made by the Workshop. Yuri Zahard can generate shinsoo bubbles from her index finger and mouth. Other than for transporting purposes, Yuri can use her shinsoo bubble for offensive and defensive, indicating that she really has complete mastery over the shinsoo bubbles.
 * Offensive: According to Karaka himself, Yuri's shinsoo bubbles "melted his body", although his "armored suit" seems to be completely fine. It might be because his armored suit was protected with a special spell. Karaka was completely trapped and surrounded by the bubbles, unable to escape. Karaka even mentioned that if the bubbles keep attacks him, his body will disappear completely (dead). Unable to escape by moving, Karaka was forced to use his teleportation technique: Return To The Abyss. Before he can escape with his technique, he was intercepted by Evan Edrok and eventually surrender. Yuri's Shinsoo Bubble could also force Kallavan to release Baam from the grip of his hand.
 * Defensive: Her green shinsoo bubbles are strong enough to provide safety for Baam and his friends from the Boiling Acid that can melt steel. Her shinsoo bubbles also strong enough to protect Yu Han Sung and saved him from Shining Fan's powerful attack of Ha Cheonhee.
 * Utility: Transport and Teleportation. Yuri Zahard used her green shinsoo bubbles again at the last station to instantly teleported Black March and use it to protect Baam from Charlie's transforming needle attack. She also use it to instantly teleport and transport Baam near to her position after the shinshoo bubbles attacked Kallavan and forced him to release his grip from Baam's right hand.

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 shinsoo 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 shinsoo 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 shinsoo bubble at the last station battlefield was produced from the Green April, but that's simply a misunderstanding because Yuri has used this shinsoo bubble before when he rescued Baam after his fight with Hoaqin. The shinsoo bubbles were created directly from her index finger, not from the Green April.
 * Evankhell mentioned the shinsoo bubbles as petty tricks.
 * Karaka didn't have any knowledge about the shinshoo bubble, although he is at the level of FUG Slayer.