Ren relaxes once the creature was dead and the danger had passed. He makes the bow and quiver disappear. Any arrows that was stuck in the ground also disappear.

He shakes his head. "No, I didn't see anything."

It's then he notices the new changes. Although he would have gotten a little flustered over seeing Minato in a suit (despite not being able to see any colors), the wings distract him. As well as the lack of fox ears and tail.

"Wings? And your fox ears and tail is gone."