It was Uchiha Ryūha.
"Uchiha Ryūha?" Naruto exclaimed in surprise. "What are you doing here?"
"I've been here all along." Liuyu walked up beside him and looked at the black vortex in the air. "Ōtsutsuki Hachiori... I didn't expect you to still be alive."
"Who are you?" Ōtsutsuki Hachiori asked warily.
"Uchiha Ryūha," Liuyu said calmly. "The King of Las Noches."
"Las Noches?" A hint of confusion entered Ōtsutsuki Hachiori's voice. "Never heard of it."
"That's only natural," Liuyu said. "Las Noches didn't exist when you were sealed away."
He extended his hand, gathering a blue orb of light in his palm. "But that doesn't matter. What matters is that it's time you went back to sleep."
"You want to seal me?" Ōtsutsuki Hachiori laughed. "You think you can?"
"I do." Liuyu hurled the orb. It swelled rapidly in midair, becoming a massive pillar of blue light that blasted toward the black vortex.
Ōtsutsuki Hachiori tried to dodge, but the pillar of light was too fast. He had no time to escape. It struck the vortex, unleashing a dazzling radiance that illuminated the entire space.
"No!" Ōtsutsuki Hachiori let out a defiant roar. His voice faded into the distance until it finally vanished within the light.
When the light faded, the black vortex was gone, and the sealing barrier had settled back into stillness.
Liuyu lowered his hand and turned to Naruto. "Are you all right?"
"We're fine." Naruto shook his head. "Thank you for saving us."
"No need to thank me," Liuyu said. "I was just passing by."
"Passing by?" Naruto looked unconvinced. "You obviously followed us here, didn't you?"
"Think whatever you like." Liuyu did not deny it. "All right, everything here has been dealt with. You can leave now."
"What about that scroll?" Naruto pointed at the