Soo

Lore & Background

This ability is a Shinsu manifestation derived from Hoaqin's Arie swordsmanship, not a general Shinsu quality. It is used by Hoaqin and his fragments, including David and Albelda, but not by Vicente—who is a separate personality/fragment of the original White (Hoaqin's older brother), not a fragment of Hoaqin himself. The ability first appeared during the Name Hunt Station arc or Hoaqin's backstory, not the Hell Train arc. It manifests as liquid-like blades that can extend or split, not as a 'water element' or shape-changing mid-strike.

In Their Own Story

The rain fell in sheets against the crystal windows of the Hell Train, but inside, the air was thick with tension. Hoaqin stood motionless, his hand outstretched, as a shimmering stream of liquid Shinsu coiled around his fingers like a serpent. 'Soo,' he whispered, and the water obeyed, hardening into a blade that gleamed with deadly intent. Across from him, his opponent braced, knowing that every drop of that fluid weapon could shift from gentle flow to relentless torrent in an instant. The battle was not just of strength, but of will—a dance with the current itself.

Reader's Guide

Soo is a Shinsu quality that allows its user to manifest liquid Shinsu, effectively controlling water-like flows in combat and utility. In-world, it functions by attuning the user's Shinsu to a fluid state, enabling them to create streams, waves, or pressurized jets that can cut, bind, or drown opponents. The power is highly adaptable: it can be used defensively to form barriers, offensively as piercing projectiles, or supportively to manipulate the environment, such as flooding areas or extinguishing fires. However, mastery requires deep concentration and a natural affinity for the element, as forcing Soo without proper control can lead to unstable or weak manifestations. Notable wielders include Hoaqin, the Slayer Candidate of FUG, who used Soo to enhance his sword techniques, and his brother Vicente, who also demonstrated this quality. The Arie Family, known for their swordsmanship, has shown proficiency with Soo, though it is not exclusive to them. Regulars and Rankers who discover this ability often train for years to refine it, as even a moment's distraction can turn a razor-sharp jet into a harmless splash.

Did You Know?

• This ability is derived from Hoaqin's Arie swordsmanship, not a general Shinsu quality or a non-Arie technique.
• It is used by Hoaqin and his fragments, including David and Albelda, not exclusively by Hoaqin.
• It first appears during the Name Hunt Station arc or Hoaqin's backstory, not the Hell Train arc.
• Vicente is not a fragment of Hoaqin/White; he is a separate personality/fragment of the original White (Hoaqin's older brother).