He is now in front of them
"Do it..."
"Very well."
Radec begins By performing a sequence of hand seals. He draws out seal markings on his left hand, and it lights on fire, emanating a green glow. He places his hand on Kooji's forehead and makes a half tiger seal with his free hand.
Since he wasn't the "Queen of Seals" as Yura was, he required a little more prep.
"Memory Seal, Release!" Radec is careful only to touch the seal to his Akatsuki memories, not the other one which Kooji had placed on himself. This requires great chakra cintrol and Radec sweats in fierce concentration.
Kooji's memories come flooding back to him. The memories of harsh, brutal training. How Radec sensei had helped him unlock the full potential of his Sharingan. His journeys to unlock the Mangekyo and eventually the Rinnegan. Bijuu hunting. The camaraderie between studentand teacher.
But at the same time, death, destruction, and trauma. The ugly truthand harsh reality of Akatsuki life.
Radec releases his hand after a few moments and leans on the vessel for support, breathing heavily.