In the Ninja World.
Suigetsu, who had had a large mass of water removed by Obito's "Kamui," immediately fell into a weakened state.
Although Suigetsu had no physical form while using the "Hydrification Technique," becoming a mass of freely moving, all-pervasive water, he was not invincible in that state.
To a certain extent, that mass of water was Suigetsu's body, as well as the vessel that carried his chakra.
To save Karin just now, he had essentially used part of his own body to replace Karin after she was hit by "Kamui." And because there had been so little time, he had not been able to withdraw the chakra contained in that mass of water. The instant it was removed by "Kamui," he had effectively lost a third, or perhaps even more, of the chakra in his body.
He had already expended a great deal of chakra in the previous battle, so after taking that blow, forget continuing to flee—even maintaining the "Hydrification Technique" was becoming difficult.
Sensing Obito's gaze landing on him again from afar, Suigetsu cried out, "This is bad!"
Karin was equally shocked and anxious.
Since she had been wearing Biological Armor the entire time, once the Type-Three Biological Armor on her body was scrapped, she could not adapt to it in such a short time. The chakra within her body was in complete chaos. Forget unleashing the Planetary Devastation she had yet to master—even bearing the Rinnegan felt immensely taxing.
Gaara's circumstances were similar to Karin's.
After the Type-Three Biological Armor was scrapped, the biological cells within it instantly died off in large numbers. This caused the spirit body residing in the Type-Three Biological Armor to lose the nourishment of chakra and rapidly weaken.
After all, Gaara's soul leaving his body this time had been Hyuga